Memory Master 2 GB (2 x 1 GB) DDR2 800MHz PC2-6400 Desktop DIMM Memory Modules (MMD2048KD2-800) at Amazon.com
Micron 1 GB DDR2 RAM Memory- 417439-051 at Amazon.com
Hynix 1GB DDR2 RAM PC2-6400 240-Pin DIMM
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