Note: While the last "balance" is the accurate number of bitcoins available to this address, it is likely not the balance available to this person. Every time a transaction is sent, some bitcoins are usually sent back to yourself at a new address (not included in the Bitcoin UI), which makes the balance of a single address misleading. See the wiki for more info on transactions.

acc8b7cad7... Block 171492 (2012-03-17 03:55:53) 0.53899078 Received: Address 0.53899078
e6f2625cb9... Block 171495 (2012-03-17 04:18:31) 0.53899078 Sent: Address 0