I just finally got around to putting in 4GB's of RAM three weeks ago after I decided to wait until the next update to get the MBP. As old as my PB is, it runs programs sooo much faster than with 2GB's. My one regret is that I didn't max out the RAM when I first bought this laptop. I'll never make that mistake again!
good to know! i was looking at other world computing for ram. that a good source?