My friend has a 12" PB.. I mean I've got a 14.1" laptop that I use as my main computer, but as a 2nd computer, damn that thing was nice. Now that I'm at uni, I can really see how a 15" is too big.. and that MacBook is just.. I don't like it at all. Nice, yes.. and I'd buy it over a 15" (due to size and price) but if Apple could just release a 12" laptop with an external CD-drive (maybe firewire400 extension?) I would snap it up in a heartbeat. Thin, Light, a long Battery, and Aluminum. 🙂
Edit:
heck, why not just forgo a media bay all together, give it one of those new PCMCIA slots (you all know what I mean) integrated graphics, and make it a hybrid tablet/notebook. Instead of a rotating hinge like Toshiba uses, why not just have the screen flip over to the bottom of the notebook, and the keyboard would be on the bottom while it's in tablet mode, and deactivated to prevent accidental touches.
Ok, what it comes down to is gateway made me a (very reliable) sub-1" laptop weighing just 4.35lbs 3 years ago (almost to the day), and I'm still waiting for apple to make me one today.
Ok. so maybe I don't know what I'm trying to say.