I honestly didn't see what the big deal with Gingerbread was. Stability? Battery life? I really never had any issues with Froyo. Only reason I wanted Gingerbread was for MIUI. As for EK23/30 or whatever, I wouldn't expect this to actually be released. And I'll be shocked as hell if we do get ICS.
An rfd file means that Sprint is actually testing the rom on Epics. I can't believe that they would waste their resources testing developing and testing a rom if they don't intend to release an update. I think it's too soon to expect any work on an ICS rom, but a bug fix release for gingerbread doesn't surprise me at all.