Last Updated: Oct 01,2010
If you root can you go back?
Yes. The process can be explained in this link:
Tutorial/Walkthrough for flashing an .sbf to Droid 2 (unrooting/factory restore) - xda-developers
It's pretty easy to do (at least for the D1 was)
Every so often it would "error" out at the end of the sbf load, but the phone was always fine and had already rebooted when it "errored"
Just be careful
Separate names with a comma.