Hey, if you want to max out speeds, Hitachi's 200GB 7200RPM notebook drive is supposed to be pretty much "desktop-grade" speed-wise. Pricey, of course, but 200GB isn't exactly small.
Is Fujitsu actually shipping those 300GB drives now? They were supposed to be available a while ago, but they only just started selling the 250GB one, so I was sort of under the impression (mistaken?) that they'd been significantly delayed.
'course, 12.5mm (I think they're 3-platter, based on the promo images) is pretty dang fat for a laptop drive these days.