In Neucoin, you'd have to send your coins to the pool. How else are they going to mine with them? I know that in Bitcoin it doesn't work that way.
If that is true, then this just another face palm for nokoin.
Nxt uses leased forging so you don't have to give up your currency, and i thought peercoin's issuance is based on PoW so you don't send your coins to the pool there either. not 100% sure on that , but I do think having to send your currency to a pool is a fail.