I must have read 5 threads today of people falling over themselves unrooting waiting for 2.1. All these threads are people in a total panic as they still use the 1 button wonders (DM Updater and ROM Manger) to try and accomplish this task. Boot loops and stuck screens and who know what plagues are upon us. If you phone is rooted and running well, you are already ahead of the game! You are running 2.1 on steroids! If you decide you want the "real" 2.1, I am willing to bet you will have it available for download (probably as I type). Calm down, take a deep breath, and think before you do or undo anything.
My 2 cents
My 2 cents