G. Skill 1GB 240-Pin PC2-5300 DDR2-667 Memory (F2-5300PHU1-1GBNT) at Amazon .com
Nanya 512MB DDR2 RAM PC2-5300 200-Pin Laptop SODIMM at Amazon.com
4GB [2x2GB] DDR2-667 (PC2-5300) RAM Memory Upgrade Kit for The Apple iMac 7,1 (20-inch, 2.0GHz, MA876LL/A) Intel Core 2 Duo (Genuine A-Tech Brand) at Amazon.com