I searched everywhere for days and couldn't figure out how to delete the original(aka "Default) email account WITHOUT doing a factory reset and loosing all my settings on a flashed Droid. I really didn't want to re-do everything for the internet and picture mail to work so I finally figured it out and thought that I would share with others.
(I don't know if this has already been posted, Ive searched and didn't find a thing. If this is already posted I do apologize and please delete)
All you have to do is use Root Explorer and go to /data/system/ and delete the file called "accounts.db". Reboot your phone after deletion and your golden.
**I would definitely recommend doing a NANDROID backup before, just in case you delete the wrong file accidentally.