You all need to store your own coins and not rely on a web-wallet.....
promoJo
I'll give you that one instantwallet then inputs and a few other wallet services
QT or Armory for safe storage of large amounts
However for quick inputs a tiny amount for transactions is fine as long as you have a Bitcoin service in the area
Or are using a Bitcoin ATM and didn't bring a printable QR code but your phone
you sould have the keys of you blockchain wallet blockchain.info does NOT have custumers private keys. , you can check the funds on blockexplorer