Corsair VSA4GSDSKIT667C4 Mac Memory 4GB 2 X 2GB $26.99
Amazon.com has Corsair VSA4GSDSKIT667C4 Mac Memory 4GB 2 X 2GB PC2-5300 667MHz 200-Pin SODIMM Memory for Apple Laptopsfor $26.99 after $40 mail-in rebate (expires 02/08/09).
4GB kit of 2×2GB modules
Mac Memory Low Latency Solution - Increase your Mac memory performance by as much as 20%
DDR2 - 667MHz
non-ECC - 200pin SODIMM
Unbuffered, CL4
G.SKILL 4GB 240-Pin DDR2 SDRAM Dual Channel Desktop Memory $34.99
Newegg has G.SKILL 4GB(2 x 2GB) 240-Pin DDR2 800 (PC2 6400) Dual Channel Kit Memory for $39.99. Use promotion code EMCBCAECE to get $5 off, making the final cost at $34.99 with free shipping.
Product specifications:
Model
F2-6400CL5D-4GBPQ
Type
240-Pin DDR2 SDRAM
Capacity
4GB (2 x 2GB)
Speed
DDR2 800 (PC2 6400)
Cas Latency
5