http://www.kotenbu.com/
New website, which should host all the news regarding the anime from here onward. Today's news is that Lantis has announced a net radio, "Kotenbu no Kuttaku" which starts April 20 with the first episode featuring Satomi Sato(Eru) and Daisuke Sakaguchi(Satoshi).
EDIT:
http://d.hatena.ne.jp/nanamibeya/20120302/p1
Looks like the show starts airing April 23 with 21 episodes?