Tony Thai - Motteke Sailor Fuku [NSF format]. This link should work for a while but I'll replace it if it starts failing [and you mention it!]
Lucky Star, for being such a "mediocre show" [according to a few of my friends who have seen it], is getting quite a bit of attention. You can hear the original tune for this cover in the previous news post. Despite the TV show itself it is quite a viral tune, probably because
MOE CANNOT BE REASONED WITH.. Maybe the fact that there will always be a new "fad anime" out these days is a good thing. More covers for us anisong fans!
Additionally, here is a YouTube video of Rockman/Megaman robots dancing to a different chip version of the Lucky Star OP. This version of the song sucks but hey, DANCING ROBOTS.