I ordered one of these from Transintl.com yesterday. (In case you don’t want to follow the links it’s a 7200rpm notebook drive. Got it this morning, created a copy of my drive using Carbon Copy Cloner (an AWESOME program) and proceeded to rip apart my poor unsuspecting Powerbook 12.
The install went fairly smoothly (Apple could make these things a bit easier to work on) except for a bit of a sticking point removing the top of the latop. I followed the instructions here and would only suggest that when all the screws are out that you lift the top off the case from the front, not the back (thankfully aluminum is pretty forgiving).
Anyway, my laptop feels a TON faster! It’s also close to 40% faster according to XBench. I can run our server, Photoshop, iTunes, Mail, emacs and still switch between them (which causes paging, ’cause I don’t have enough ram… waiting for the 1gb dimms to get cheaper first) without the machine choking!
I would recommend this mod to anyone who wants to significantly improve the performance of their laptop…