mushkin 4GB (2 x 2GB) SO-DIMM DDR3 1066 (PC3 8500) Dual Memory $49.99

Newegg.com has a mushkin 4GB (2 x 2GB) 204-Pin DDR3 SO-DIMM DDR3 1066 (PC3 8500) Dual Channel Kit Laptop Memory for $49.99 after $5 rebate with Free Shipping.