A very good website, infact... invalubable, however the plugins listed are almost contradicting without knowledge of the software and what you want to use. You wouldn't use OML and Mediabrowser as they offer the same results but with different interfaces. Likewise with FFDShow and AC3Filter.
I'm not bigging myself up at all, however I've written a pretty useful post in my build thread regarding plugins that are a great addition to any 7MC setup. Clicky here
MyMovies
myTV
MediaControl (to allow subtitle control via remote)
MCStudio (whilst not strictly a plug-in, it allows you to customise the options and layout within the MC interface)