Is there a published list of diagnostics for the Droid?
Things like these with what they do.

*228 options 1and 2
#832 will restore your apps after a data reset
hold power and x

This link has some interesting functions/abilities that I didn't know about before.

This link from XDA is probably more what you are looking for, with lots of dialer codes that do many things.

-----
Recommended reading for new AndroidPIT members! Important to all community members: the AndroidPIT Forum rules