I prefer this theme, but I think the forum can handle different themes and then users select the one they want.
The problem is each theme needs a title logo for it, which I don't have nearly enough time to do. If you want a theme, and you can design the top logo, then post here and i'll upload it.
Now that's a plan
Is it limited to the 3.0.1 themes or can we do 3.0.0? I don't really know anything about pbpBB.
Also, if anyone wants to make a gear logo from scratch, here's a blank .psd template: