I'm using Cryptsy and Coinex. Both seem to tolerate deposits from pools even though they warn against it.
I'll look into the block stats later on - my current pool's front end is down at the moment.
OP was talking about p2pool.
For pools like p2pool and Eligius, the pool payment will be done in coinbase transaction (block reward transaction with no inputs).
For other pools like btcguild, the pool will send you payment as an ordinary bitcoin tx.