[r-a-y]

Rohan is wrong.

It’s available at bbShowcase:

http://bbshowcase.org/forums/view/available-themes

Look for the “bbOrg” theme.

There’s also a similar version called “The Hybrid / aka Kakumei Too”

They’re probably not updated for bbPress v1.01 though, but with a few adjustments you could probably get there.