I'd love to use this for brainstorming at work! I'm not familiar with ruby/rails, and so I'm running into version problems I think because ruby has been updated a bunch since this was last revised.

For example:

• I have taskjuggler3 installed, which uses current ruby/rails versions
• I got to rake gems:install and get conflicts between 2.3.5 versions of gems and the rails3 versions
• thinking sphinx also wants > 3.0.3 for some gems, but the manual specifies installing rails 2.3.5

How does one get this up and running with current ruby/rails?

Are you developing this anymore? It's an awesome application and I really hope to use it!

Rake doesn't seem to run.

I have installed:
Sphinx 0.9.9
thinking-sphinx (1.3.20)

Error shown:

rake db:migrate --trace

(in //httpdocs/openmind)
* Invoke db:migrate (first_time)
** Invoke environment (first_time)
** Execute environment
Observers are disabled. This should be the case if you've not yet run
your initial migration. Once the initial migration is complete, you should
enable observers by copy the file:
//httpdocs/openmind/config/observe.no.txt
to
//httpdocs/openmind/config/observe.txt
Requiring REXML
** Execute db:migrate
== SeedUser: migrating =======================================================
rake aborted!
An error has occurred, all later migrations canceled:

undefined method delta=' for #<User:0xb7038470> /*/httpdocs/openmind/vendor/rails/activerecord/lib/active_record/attribute_methods.rb:255:inmethod_missing'
/usr/lib/ruby/gems/1.8/gems/thinking-sphinx-1.3.20/lib/thinking_sphinx/deltas/default_delta.rb:23:in toggle' /usr/lib/ruby/gems/1.8/gems/thinking-sphinx-1.3.20/lib/thinking_sphinx/active_record/delta.rb:35:intoggle_delta'
//httpdocs/openmind/vendor/rails/activesupport/lib/active_support/callbacks.rb:178:in send' /_/httpdocs/openmind/vendor/rails/activesupport/lib/active_support/callbacks.rb:178:in evaluate_method'
/*/httpdocs/openmind/vendor/rails/activesupport/lib/active_support/callbacks.rb:166:incall' /_/httpdocs/openmind/vendor/rails/activesupport/lib/active_support/callbacks.rb:93:in run'
//httpdocs/openmind/vendor/rails/activesupport/lib/active_support/callbacks.rb:92:in each' /*/httpdocs/openmind/vendor/rails/activesupport/lib/active_support/callbacks.rb:92:insend'
//httpdocs/openmind/vendor/rails/activesupport/lib/active_support/callbacks.rb:92:in run' /_/httpdocs/openmind/vendor/rails/activesupport/lib/active_support/callbacks.rb:276:in run_callbacks'
/*/httpdocs/openmind/vendor/rails/activerecord/lib/active_record/callbacks.rb:344:incallback' /_/httpdocs/openmind/vendor/rails/activerecord/lib/active_record/callbacks.rb:249:in create_or_update'
//httpdocs/openmind/vendor/rails/activerecord/lib/active_record/base.rb:2556:in save_without_validation!' /*/httpdocs/openmind/vendor/rails/activerecord/lib/active_record/validations.rb:1019:insave_without_dirty!'
//httpdocs/openmind/vendor/rails/activerecord/lib/active_record/dirty.rb:87:in save_without_transactions!' /_/httpdocs/openmind/vendor/rails/activerecord/lib/active_record/transactions.rb:200:in save!'
//httpdocs/openmind/vendor/rails/activerecord/lib/active_record/connection_adapters/abstract/database_statements.rb:136:intransaction_without_callback' /usr/lib/ruby/gems/1.8/gems/after_commit-1.0.8/lib/after_commit/connection_adapters.rb:12:in transaction'
//httpdocs/openmind/vendor/rails/activerecord/lib/active_record/transactions.rb:182:intransaction' /_/httpdocs/openmind/vendor/rails/activerecord/lib/active_record/transactions.rb:200:in save!'
//httpdocs/openmind/vendor/rails/activerecord/lib/active_record/transactions.rb:208:in rollback_active_record_state!' /*/httpdocs/openmind/vendor/rails/activerecord/lib/active_record/transactions.rb:200:insave!'
//httpdocs/openmind/vendor/rails/activerecord/lib/active_record/validations.rb:990:in create!' /_/httpdocs/openmind/vendor/rails/activesupport/lib/active_support/option_merger.rb:20:in send'
//httpdocs/openmind/vendor/rails/activesupport/lib/active_support/option_merger.rb:20:inmethod_missing' ./db/migrate//010_seed_user.rb:8:in up_without_benchmarks'
//httpdocs/openmind/vendor/rails/activesupport/lib/active_support/core_ext/object/misc.rb:78:inwith_options' ./db/migrate//010_seed_user.rb:4:in up_without_benchmarks'
//httpdocs/openmind/vendor/rails/activerecord/lib/active_record/migration.rb:282:insend' /_/httpdocs/openmind/vendor/rails/activerecord/lib/active_record/migration.rb:282:in migrate'
/usr/lib/ruby/1.8/benchmark.rb:293:inmeasure' /_/httpdocs/openmind/vendor/rails/activerecord/lib/active_record/migration.rb:282:in migrate'
(DELEGATION):2:in**send**' (**DELEGATION**):2:in migrate'
//httpdocs/openmind/vendor/rails/activerecord/lib/active_record/migration.rb:486:inmigrate' /_/httpdocs/openmind/vendor/rails/activerecord/lib/active_record/migration.rb:562:in call'
//httpdocs/openmind/vendor/rails/activerecord/lib/active_record/migration.rb:562:in ddl_transaction' /*/httpdocs/openmind/vendor/rails/activerecord/lib/active_record/migration.rb:485:inmigrate'
//httpdocs/openmind/vendor/rails/activerecord/lib/active_record/migration.rb:472:in each' /_/httpdocs/openmind/vendor/rails/activerecord/lib/active_record/migration.rb:472:in migrate'
/*/httpdocs/openmind/vendor/rails/activerecord/lib/active_record/migration.rb:400:inup' /_/httpdocs/openmind/vendor/rails/activerecord/lib/active_record/migration.rb:383:in migrate'
//httpdocs/openmind/vendor/rails/railties/lib/tasks/databases.rake:116
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:in call' /usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:636:inexecute'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:in each' /usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:631:inexecute'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:597:in invoke_with_call_chain' /usr/lib/ruby/1.8/monitor.rb:242:insynchronize'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:590:in invoke_with_call_chain' /usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:583:ininvoke'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2051:in invoke_task' /usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:intop_level'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:in each' /usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2029:intop_level'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:in standard_exception_handling' /usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2023:intop_level'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2001:in run' /usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:2068:instandard_exception_handling'
/usr/lib/ruby/gems/1.8/gems/rake-0.8.7/lib/rake.rb:1998:in run' /usr/lib/ruby/gems/1.8/gems/rake-0.8.7/bin/rake:31 /usr/bin/rake:19:inload'
/usr/bin/rake:19

What I don't seem to understand is some lines on:
sphinx.yml: bin_path: 'c:/sphinx/bin' ? (i've removed this line)
development.sphinx.conf: contains a lot of hardcoded information (path, mysql account,...)

Does this has anything to do with the problem?