I'm looking into buying a new laptop at the moment and it seems I'm in luck with Intel just now releasing it's Banias notebook CPU.

Seems the little bugger is some sort of beefed up P3, but in most areas it kicks P4 booty, or seems at least very capable of keeping up with it's big brother.

One thing puzzles me however. Anandtech has recently put up a review of 3 different Centrino notebooks, and they also show the insides of those laptops.

I couldn't help but notice that all of those notebooks seem to have an empty socket on their motherboards (I've only given one example, but they've all got it). What's this socket for? Is it for another Banias CPU to work in a dual-CPU configuration or is this socket meant for something else (and if so, what exactly?)
I haven't found any info on this yet.

Does anybody know this?