HP 517844-001 - 2GB, 667MHz, PC2-6400, DDR2 SDRAM Small Outline Dual In-Line Memory Module (SODIMM) Part 517844-001 598858-001
Office Depot
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