If you want 2GB today, swing over to your local Best Buy, and you can get 2 1GB PNY SO-DIMMs for Macbooks and Macbook Pros for 75 for each 1GB SO-DIMM. Its Micron RAM, and they're rather well built, unlike their older generic crap RAM.
Hold onto that receipt though. For that "lifetime" warranty, they need the receipt to see when you purchased it. 😵'
Sale ends today though. If they're out, get a raincheck. 😀
Other than that, G.Skill rocks. Awesome RAM, pretty decent quality, cheap price, and it overclocks pretty nicely.
I'm thinking about adding another 2GB to my computer.