I've fed up with juggling music, video and game downloads on my PS3 40GB hard drive, decide to order this before Fallout 3 DLC is available.
Type Hard drive - internal
Form Factor 2.5" x 1/8H
Dimensions (WxDxH) 7 cm x 10 cm x 9.5 mm
Weight 117 g
Capacity 500 GB
Interface Type Serial ATA-300
Data Transfer Rate 300 MBps
Spindle Speed 5400 rpm
Buffer Size 8 MB
Manufacturer Warranty 3 years warranty
Choose within 5 days for free delivery
PS: I know people might be worried about this is a SATA II rather than a SATA. Although PS3 won't benefit from enhanced data rate from SATA II, it should work well as an ordinary SATA hard drive. The reviews confirm this too.
Western Digital 500GB 2.5" Hard Drive SATAII 5400rpm 8MB Cache - OEM Scorpio Blue
Amazon also have this for the same price :)