PowerPC itself, maybe, but Cell and POWER6 are pretty cool. Especially since POWER6 is running around 5GHz these days.
OK, here's today's speculation:
It'll be a Cell/POWER6 based mini-itx board with Clone-A built in for 100% classic compatibility. It will be pre-assembled in an awesome looking wedge case, with a 1TB SSD as the hard drive. It will be available this weekend for £199.