According to the cover of "Maker Odan Anime Guide 2010 Summer", a special episode(s) of Hidamari Sketch x ☆☆☆
was revealed. The booklet will be distributed at Comiket 78.
The special anime was supposed to be announced at TBS Anime Festa to be held on August 7th - 8th, but Media Factory accidentally leaked it. Aniplex PR staff posted in the blog that "We have prematurely leaked information by ourselves, but it's for the first time that other company leaked our anime."
Sources: Okami-san official website
, Cover image of the booklet
, Sendenman blog