what type of HDD does the ps3 take?

what size, speed, etc... im thinking of upgrading because my 40 gigs is getting low, and soon with the release of playtv in australia (out in america yet?) i'll need some more space.

thanks

http://talkplaystation.com/7200rpm-vs-5400rpm-hard-drive/

Hope this helps.

2.5" SATA at 5400RPM I believe...caponord720

5400RPM is the correct one. If you get the 7200RPM is cause extra heat to build up within the ps3.