Amazon.com: OWC 4GB (2 x 2GB) PC5300 DDR2 667MHz SO-DIMMs Memory Compatible with MacBook, MacBook Pro, iMac, Mac Mini Core 2 Duo Models (OWC5300DDR2S4GP) : Everything Else
Kingston Technology 1 GB DIMM Memory 2 667 MHz (PC2 5300) 240-Pin DDR2 SDRAM Single (Not a kit) KTD-DM8400B/1G at Amazon.com
Kingston ValueRAM 2GB DDR2 667MHz FBDIMM Desktop Server Memory at Amazon.com
parts-quick 41Y2732 4GB 2 X 2GB PC2-5300 667MHz 240 pin DDR2 SDRAM ECC DIMM Desktop Server Memory for IBM System x3200 4362, 4363-xxx Brand at Amazon .com
Crucial 4GB Single DDR2 667MHz (PC2-5300) CL5 SODIMM 200-Pin Notebook Memory Module CT51264AC667 at Amazon.com