My wife marched me into Best Buy, and she selected the D2. At the time they had 1 D1 left in stock, and it was "free" with 2 yr. I had heard that the D2 and DX both had locked bootloaders, so I picked up the D1.
I am an avid PC overclocker, and dual boot Ubuntu 10.04 on one of my systems. I am just doing research right now to root and OC my D1. I can't do anything about the RAM, but I would like to make it run a little more "crisp". I love my new phone, I joked with my wife that I was going to box up my systems, cause I didn't need them any more, I had a droid now. Currently running FRG22D stock.