Blake was kind enough to a google doc spreadsheet of lut formats:
http://spreadsheets.google.com/ccc?key=0Avn2cZhY9jaYdF9qTHYteU1MUDYtdnFkSDJQdHpaU1E&hl=en

I'll try to edit it to keep it up to date. (what formats we support,
are planning to support, have examples of, etc). And eventually it'll
probably turn into part of the ocs website.