I have a Western Digital 500GB SATA WD5000BEVT notebook hard drive which has been used for about 2 months. It has been working well.
It was bought from Newegg.com and it should in the 3-year warranty.
IBMThinkpad T41Home | X31Travel | X60fun 2GHz Dothan (X60 C2D, X31 1.7 Banias), 2GB RAM, 320GB HDD, DVD Multi-Burner, IBM 11b/g, Bluetooth II, Docks
multi-boot (98SE, W2K, XP PRO, Win7, Linux Mint 10)