UPDATE: From both Robert's Anime Corner Store and Right Stuf comes word that it'll be SIX episodes, not five-- half of the first season. (You can preorder it and other May titles from Media Blasters right now, btw.)
There's no word on Moyashimon for now, but man, I'm so excited for Zetsubou-sensei that I do not even care. At all. Let's throw a party! Here, I'll be in charge of the music.
For those of you not already familiar with the series (and you should be, because Del Rey Manga has been releasing the manga at a steady clip), Sayonara Zetsubou Sensei is a dark comedy about an eternally pessimistic teacher whose name can be read "Zetsubou" instead of Nozomu Itoshiki, and his unique array of (mostly female) students-- including an eternal optimist, an obssessive-compulsive girl, a girl with a fetish for tails, a fujoshi, and many others. It's good times.
For everyone else: party time in the comments!