Casascius,
So, you create a new paper wallet every time following a transaction? I've got to read up on this idea.
P.s. your physical Bitcoins are fantastic, I love the idea!
I just print off a ton of them in advance so I don't have to create a new one. For example, I can print 7 unique addresses to a page at Bitaddress.org, and I can just as easily print a dozen pages that'll last me a while.
I simply send bitcoins to the first address and write how many BTC it contains. When I need to spend them, I import them, send off the coins, and make sure the change goes to the next address on the list. I write the new amount in spot 2, and cross out the first one. After all 7 spots are used, throw it away and use a new page.
Result: minimum exposure of online bitcoins.
Ok, this has created more questions:
1) Bitcoins exist in reference to a specific address?
2) Wallets are merely a collection of address(es)?
3) A page of addresses printed from bitaddress.org is a paper version of a wallet?
4) This paper wallet exists independently of any other wallet and is hack/theft proof, unless someone steals the paper?
5) Is a casascius coin essentially a physical wallet?