Kingston 2 GB DDR2 SDRAM Memory Module 2 GB (1 x 2 GB) 667MHz DDR2 SDRAM 200pin KTT667D2/2G at Amazon.com
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
4GB 2 X 2GB PC2-5300F 667MHz 240 pin DDR2 SDRAM ECC Fully Buffered FB DIMM Server Low Power Memory for HP ProLiant DL140 G3 (PARTS-QUICK BRAND). Equivalent to HP Part Numbers: 397413-B21,
Amazon.com: 2GB 2 X 1GB PC2-5300 667MHz 240 pin DDR2 SDRAM ECC DIMM Desktop Server Memory for Dell PowerEdge SC440 (Parts-Quick Brand) : Electronics
Amazon.com: OWC 2GB PC5300 DDR2 667MHz SO-DIMM Memory Compatible with MacBook, MacBook Pro, iMac, and Mac Mini Models with Core 2 Duo Processor (OWC5300DDR2S2GB) : Everything Else
Amazon.com: Komputerbay MACMEMORY 6GB Kit (4GB + 2GB Modules) PC2-5300 667MHz DDR2 SODIMM for Apple iMac MacBook Pro : Everything Else