According to the Feburary issue of Monthly Flowers magazine, an anime adaptation of Kodama Yuki's Sakamaichi no Apollon is currently in production. It will begin airing Spring 2012.
Here is a synopsis of the manga courtesy of mangaupdates;

Watsuki Nobuhiro will debut a reboot of his hit series manga Rurouni Kenshin which, according to the latest issue of Jump Square will be released in the June issue of the magazine. It goes on sale May 4th, 2012.

Source
Moetron