Also, recommending pywallet for someone who will need to export a couple private keys is a bit overkill lol
If your wallet includes funds sent to change addresses, how would you know these addresses?
Get them looking for the transactions you sent on blockchain.info and blockexplorer.com?
Notice I said a couple private keys. For big/huge wallets pywallet is the way to go.
Just remember that the blockchain.info wallet has a 400 addresses limit, so, if the wallet is really big, importing the pywallet wallet dump there is not the way to go.