Consider the alternative of mybitcoin.com. It is a client portable to any web browser. You could keep the account/password in your head instead of on a stick. If you want to transact with another mybitcoin account the transaction is immediate too.
I already have a mybitcoin.com account, but I'd still like to have one running one my thumbdrive. And now I do, thanks to the many suggestions that I have already received.