Well, since the ELH is not OGL (unless WotC puts it up ASAP), IMHO, though, of course IANAL, we couldn't put up Wild Spellcraft epic rules even if we wanted to. Also, I don't even own the ELH, and, no offense to anyone who does, but I really never saw the point to it. Maybe, some day, I might play a game up to level 30, but really the difference between 20 and 30 is minor, and I'd rather not deal with going that high-level. Of course, YMMV.
Seriously, I hadn't considered it. If I get the ELH, I might look into it though.