Team 1GB Elite DDR2 SO-DIMM 667MHz PC2-5400 Laptop Memory Module (200 pins) at Amazon.com
Amazon.com: OWC 2GB (2 x 1GB) PC5300 DDR2 667MHz SO-DIMMs Memory Compatible with MacBook/MacBook Pro, iMac, and Mac Mini Models (OWC5300DDR2S2GP) : Everything Else