The anime will be due some time in April next year.
It is also important to note that B★RS is not Miku nor a Vocaloid! B★RS has got its own little world separate from the Vocaloid one.
B★RS is an original character via Huke based on Vocaloid(only the twin tails I heard)Hatsune Miku. Then Ryo was inspired by the art and composed the B★RS song,
which in turn popularized B★RS.
3D Pv
Many fanvids,art,covers, were created and ongoing.The B★RS song is even the intro to the "7 Colors of Nico Nico"
Then there was also a figure made,and now the anime.
Animelo Summer Live 2009
The pilot-version is set to release on September and will be some sort of intro to the anime. If you want you can pre-order the dvd here or the blue-ray here.
The only potential problem is the fact that the director is the same one as Haruhi.
Endless eight with BRS doesn't sound that appealing.
Do your research. He was fired from KyoAni after the first four episodes of Lucky Star. He had nothing to do with E8. If you need something to gauge his abilities, just look at Kannagi.