OCZ OCZ3P16002GK 2gb kit (1gb x 2) 1600mhz 7-7-7-20 240-pin ddr3 dimm w/heat spreader ($40 Mail-In Manufacturer Rebate Available from 12/1/08 till 12/16/08)
CORSAIR value select VS512MB400 512mb pc3200 400mhz cl2.5 184-pin ddr dimm ($10 Mail-In Manufacturer Rebate Available from 12/1/08 till 12/15/08)
CRUCIAL 512mb CT6464AA667 pc2-5300 667mhz cl5 240-pin ddr2 dimm
CRUCIAL 512mb pc2-5300 667mhz cl5 ddr2 200-pin notebook sodimm