Just playing around with getting Box2D integrated with Torque Game Builder.
Which I guess is a bit of pointless, since Torque 2D (its replacement) is going to have Box2D as its default physics engine, but it's fun, nonetheless. Completed integrated and working on the Windows build, and I'm working on the Mac build right now.
I've had a couple simple things come to mind, and I might work on them while I'm waiting for Srehpog to be on Messenger (and not Away) at the same time as I am so that we can discuss the OS X and XBOX ports of Waxy's Sushi Party, but I don't have any long-term plans for any games using Box2D right now - I have no design talent, only development.