W0W... a big THANK YOU to the OP for this thread on how to return to stock. Needing to get my Fascinate exchanged due to excessive sidetone.
My Fascinate ALREADY had Froyo 2.2, and was able to go back to DI01, then do the automatic OTA updates to get to ED03 (yes, it really exists!).
NOTE: When I did the DI01 flash, Odin screen showed successful completion in about 4 min. My phone, however, hung the 'Download' screen with about 3/4 completion... scary! After about 20 minutes of the download screen not changing, I finally unplugged the phone, and booted up. Flash DID complete successfully! So... I guess if this happens to you, don't panic like I did!