I was thinking along the lines of when Coffeebucks starts to take bitcoin. If I don't have an online wallet is there a way to link the wallet from my PC to my phone to pay for such things?
Yes, there is a bitcoin android app, and you can import your addresses key from the client.
On Bitcoin-QT enter dumpprivkey in the console. (DO NOT SHARE THIS WITH ANYONE, THEY WILL BE ABLE TO SPEND YOUR CONS IF YOU DO!)
Then, go into the bitcoin app and follow the instructions to import the key there. Good Luck!
Wait.. I went off on a tangent.
http://blockchain.info and the corresponding android app are very secure online wallets.