I got the droid my self today and was having problems with my exchange email set, I figured out that if you use the physcial keyboard once in exchange server setting you in the first box displayed domain/username it must be the domain example: ag/1234gfAfter looking into my own Exchange Server 2003, I can tell you the the PIN is not the problem. I have that box UNCHECKED (so that a PIN was not enforced), and I am still having the same issue as everyone else.
I wonder if it has something to do with installing certificates on the Droid.
Anybody else want to chime in?
read the whole thread, there are some things that fix this...