Kingston 4GB (2 x 2GB) 200-Pin DDR2 SO-DIMM DDR2 800 (PC2 6400) Laptop Memory Model KVR800D2S5/2G - Newegg.com
Crucial 4GB Single DDR2 667MHz (PC2-5300) CL5 SODIMM 200-Pin Notebook Memory Module CT51264AC667 at Amazon.com
8GB 2X 4GB DDR2 PC2-6400 800MHz 200 pin SODIMM Laptop Memory RAM for HP Pavilion Entertainment Notebook dv7 1200 1400 Series (PARTS-QUICK Brand) at Amazon.com