Rumour has it that Apple and Dell will get first dibs. I've even heard "Apple first" though it may not be Conroe, but ... aaugh.... the other one. Smithfield? Argh.
Every bit as good, but more.... laptop chip, rather than desktop. IIRC.
Besides.... it's pure speculation. Apple has done a good job keeping their lips shut tight. They don't want another slip-up like they did when they released ATI data too soon! ATI almost pulled all Apple support forever over that one!