I found this on XDA and it saved me from having to make a trip to Radio Shack to get a new phone.
[How To] Return to Stock / Fix Bricked Epic - xda-developers
IMPORTANT NOTE: There are 8 pages of discussion following the OP and they are worth reading, however, do not download the mirror for the files on post #3. They are incomplete. Use the Rapidshare link at the top of the page and it will work just fine. It takes about 75 minutes to download it with the free download.