An update - He released 2 singles this year so far:
[2011.03.09] Haru no Yukundo (春の行人; Spring's Traveller) (Ochugen)
[2011.08.10] Kimi no Kakera feat. Miyamoto Emiri (君ノカケラ)
For the single released earlier this month, the covers can be seen here:
http://www.generasia.com/wiki/Kimi_no_Kakera
The promo pic is awesome, and he looks really hot in the covers.
And apparently, the song Kimi No Kakera had an anime tie-in.
When are we getting a new studio album, it feels like it's been so long since Kizuna Uta.