Overclockers Online posted a review on the G.Skill 2x2GB PC2 8800 (F2-8800CL5D-4GBPI)

To sum things up, the F2-8800CL5D-4GBPI is a good kit as long as you don't expect too much above stock speeds. However, with attractive heatspreaders and even more attractive prices of DDR2, this is a great kit to add 4 gigabytes of memory for very little dough.

G.Skill 2x2GB PC2 8800 (F2-8800CL5D-4GBPI) Review