Which mining pools do not require account creation? I know Eligius doesn't have a lengthly setup process, you just use your payout address as the username.

Which other pools are this easy to start with?
You can try http://p2pool.info/

And P2Pool.info does not keep fees, they redistribute it ;)

In general you don't have to subscribe to P2P Pool (just search for "p2p bitcoin pool").