This reminds me of
multicoin.
I'm afraid you'll need to also offer Scrypt as an option so that "anti-asic" cultists can use your service.
I guess you're afraid of them later asking for quark-like pow and the rest of newer-but-less-secure-than-bitcoin's-sha256 schemes, to exercise forever their god-given universal right to GPU-mining announced by Gamer the prophet, he said:
"GPU mining will follow botnets, then it will disappear on the second coming of the ASIC.
The story will repeat with each new stupid PoW invented to eternity,
for the greatest glory of Gamer the elf, the first gamer to mine experienceCoins while he was not playing (while he was asleep)".
Enough joking.
Great idea, this is going to be fun.
EDIT: I see you already have scrypt, more fun!
