The Inquirer reports ATI has delayed the RD580 CrossFire Radeon Xpress 3200 motherboards to February. Normally these boards were supposed to be launched together with the Radeon X1900 series on Tuesday.
In the meantime, ATI recommends using Asus' Crossfire motherboard, based on the RD480 chipset as this one is stable and hunky-dory. Others should be fine but Asus has won too many hearts with this implementation, including ours. It just works so well. Your USB performance might not be at the top of the tree but that's our only quibble. It uses a ULI chipset that should be better than the company's SB450 anyroadmap.