This is pretty minimal right now, as this exists mainly as a way for the author to avoid 1) VimRepress and 2) actually writing posts via the web interface.
Note that we require the excellent webapi library.
If you are using NeoBundle, then the following incantations will suffice:
NeoBundle 'RsrchBoy/metaWeblog.vim' { 'depends': 'mattn/webapi-vim' }
...flavour to suit.