How to generate PPCoins using Proof of Stake? PPCoins uses Proof of Stake (in addition to Proof of Work) to generate coins.


Must the client be online for this generation to happen?
Do PPCoins stored in any web wallets / exchanges generate coins for you?
Yes
Yes, but it's not a great idea to do that. Coins need to sit in a wallet for at least 30 days before they start generating stake. I would never leave coins in an exchange\online wallet idle for 30 days.