But isnt blockchain.info like a bank? So they will want to make sure the transaction is 100% valid until they allow me to send it to a 3rd party, correct?
No. Blockchain.info is just a service that stores your private keys for you in encrypted form. That way you can access your private keys from any internet connected device. Blockchain.info does not insure your bitcoins, and doesn't care what happens to them. It is up to you to provide adequate security for your bitcoins.
I'm pretty sure they will allow you to send the bitcoins with just 1 confirmation. I think I've even seen comments from people here at bitcointalk.org indicating that blockchain allowed them to send bitcoins that still had 0 confirmations (although that might have been through the API instead of the user interface).