From the Toys Section:
Once again, Amazon.com offers the OCZ 4GB PC2-6400 DDR2-800 SO-DIMM Dual Channel Notebook Memory Kit with two 2GB SO-DIMMs, model no. OCZ2M8004GK, for $39.90. This $15 mail-in rebate drops it to $24.90. With free shipping, that ties last month’s mention as the lowest total price we could find. Why not max out your Mac for for a few bucks.
This RAM will work in Pre-DisplayPort MacBooks, MacBook Pros, Minis and iMacs. Make sure to check your device before purchasing.