Vircurex - https://vircurex.com/welcome/index?referral_id=45-2213 - Trade PPC for USD, EUR, BTC, LTC, TRC, DVC, NMC, IXC, FC
Vircurex: Minimum 0,1 (?) PPC - Withdrawal fee 2 PPC (?) - Deposit methods: Currently only BTC
BTC-E - https://btc-e.com - Trade PPC for USD, EUR, BTC, LTC, TRC, NMC, FC
BTC-E: Minimum 0,1 PPC - Withdrawal Fee 0,1 PPC - Deposit methods Perfect Money, Interkassa, OKPAY (until now), SEPA (only large amounts)
BTER Exchange - http://bter.com/trade/ppc_btc
BTER: I think withdrawal fee was 0,01 PPC, could have been 0,1 PPC though. Deposit methods only BTC and CNY via a Chinese payment provider unknown
Cryptonit - http://cryptonit.net/
Cryptsy - https://www.cryptsy.com/
Coins-e - http://www.coins-e.com/
Crypto-Trade - https://crypto-trade.com/trade/ppc_btc
Crypto-Trade: Minimum 0,1 PPC - Withdrawal fee 0.01 PPC - Deposit methods OKPay, Perfect Money
MCXNOW - https://mcxnow.com/
CoinMkt - https://coinmkt.com - deposits can be made with Dwolla, International Wire (minimum 500 USD) and Money Order. Definitely looks interesting, as it claims to be KYC/AML compliant.