ASUS has listed several of its boards that will work with a BIOS update. Probably other companies are doing the same. I'd personally wait for the new boards, as they will have better functionality with the new chips. Of course, since there are no Phenoms yet on the market, there is really no reason to buy a board yet.
Barcelona does has support in the QFX board, but that is not a common board, if you're thinking of going that direction. Again, a BIOS update would be good.