Sounds like something for me to explore over the weekend. If I'm successful, it will remove the need to use one of those on-line wallet services. Wherever you are, you can get the address of your 1 wallet.
Is there a way of merging wallets together or sharing them? I really see no reason to have a wallet on each machine (2 on a dual boot machine), that are all separate. To move coins from one machine to another is like announcing to the world that I'm moving coins from one pocket to another.
I guess what I really could do is memorize the one address I want to use for incoming transfers, but isn't that kind of the point of having a large hash?