I will let you know soon. I have one on order now. Mine will have 4 gigs, but I might upgrade it to 6 using one of the recently announced 4GB chips from ramjet. I don't think the new MacBook Pros can do 8GB.

I maxed the processor at 2.8GHz on this order and am getting a 7200rmp drive. Right now, I'm using a 2.16GHz Core Duo with a 5400rpm drive, so I expect to see a very noticeable difference.