JustAnIdeaFilter: The option for the OP to close their own AskMe thread upon choosing one or more posts as best answer.
WhenMeFiIsDownFilter: Any chance we could see a message a la Flickr-style like MetaFilter is getting a massage and will return soon or something to that effect? Not trying to sound snarky, but ideally I think it'd be better than the hanging pages and timeouts we usually get.
TinyPonyFilter: Add HTML LINK element to MetaTalk's HEAD content to benefit the RSS features in Mozilla.
I'd like to see individual comments feeds for all MeFi posts. This would make threads much easier to track. Also, could we get feeds for MeFi tags too perhaps? And what about feeds for each user's posts and comments, like how 43 Things uses them.