Blockchain.info is one of the quickest, most reliable and easiest ways I have found to store and transmit Bitcoin. BlockChain.info Wallets have features that allow you to maintain the private keys of your wallet so if BlockChain.info ever goes down like Mt. Gox you’ll still have all your Bitcoin. If you are going to store large amounts of Bitcoin in your BlockChain wallet make sure you get the backup of your wallet for safe keeping.
When you sign up – your blockchain wallet will be attached to the e-mail you sign up with, and you can create multiple wallets that are attached to one e-mail or register several emails.