Combine Drupal, mameinfo.dat, history.dat and YouTube and you get MAME reviews - a catalogue of games emulated by MAME, with ratings and videos.
I need to drastically improve the search and browsing, but that shouldn't take long. Attaching moffstar's excellent MAME run-throughs to games at the moment (eg): if you have any videos (xvidcap and kino work well for capturing and editing, respectively), post a YouTube link in the comments for the appropriate game.