user3667: The firstbits address on the front of the coin (once fully resolved from blockexplorer) is just like any other address right? I can buy a 1 BTC Casascius physical coin, copy the address, bury that coin in my backyard, and use regular transactions to keep increasing its value?

user3627: Yes, you can add value.  The block chain only knows public keys. It doesn't care how or where the corresponding private keys are stored. 

3667: <p>The firstbits address on the front of the coin (once fully resolved from blockexplorer) is just like any other address right? I can buy a 1 BTC Casascius physical coin, copy the address, bury that coin in my backyard, and use regular transactions to keep increasing its value?</p>
 3627: <p>Yes, you can add value.  The block chain only knows public keys. It doesn't care how or where the corresponding private keys are stored. </p>
