I'm kind of surprised this hasn't been mentioned yet.
According to MOON PHASE, there's currently a NHK ni Youkoso anime in production.
http://www.moonphase.cc/Html/anime.html
Look for NHKにようこそ!
The anime is now official.
http://www.kadokawa.co.jp/comic/bk_search.php?pcd=200503000694
Shounen Ace!