NewEgg.com has the G.SKILL 4GB PC2-6400 DDR2 Dual Channel Memory Kit (Notebook SODIMM) for $40 - $5 code MEM155 [Exp 1/15] + $0 shipping = $35 shipped. It runs at a CAS latency of 5 and a voltage of 1.8V.
NewEgg.com has the G.SKILL 4GB PC2-6400 DDR2 Dual Channel Memory Kit (Notebook SODIMM) for $40 - $5 code MEM12155 [Exp 12/23] + $0 shipping = $35 shipped. It runs at a CAS latency of 5 and a voltage of 1.8V.
NewEgg.com has the G.SKILL 4GB PC2-6400 DDR2 Dual Channel Memory Kit (Notebook SODIMM) for $49 - $5 code EMCBBCACB [Exp 11/26] + $0 shipping = $44 shipped. It runs at a CAS latency of 5 and a voltage of 1.8V.
NewEgg.com has the G.SKILL 4GB PC2-6400 DDR2 Dual Channel Memory Kit (Notebook SODIMM) for $49 - $5 code MEM11185 [Exp 11/25] + $0 shipping = $44 shipped. It runs at a CAS latency of 5 and a voltage of 1.8V.
NewEgg.com has the G.SKILL 4GB PC2-6400 DDR2 Dual Channel Memory Kit (Notebook SODIMM) for $60 - $5 code MEM10205 [Exp 10/27] + $0 shipping = $55 shipped. It runs at a CAS latency of 5 and a voltage of 1.8V.
NewEgg.com has the G.SKILL 4GB PC2-6400 DDR2 Dual Channel Memory Kit (Notebook SODIMM) for $60 - $5 code MEM106005 [Exp 10/13] + $0 shipping = $55 shipped. It runs at a CAS latency of 5 and a voltage of 1.8V.
NewEgg.com has the G.SKILL 4GB PC2-6400 DDR2 Dual Channel Memory Kit (Notebook SODIMM) for $65 - $5 code EMCAKAFAK [Exp 9/11] + $0 shipping = $60 shipped. It runs at a CAS latency of 5 and a voltage of 1.8V.