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.

8c452ff1ef... Block 167838 (2012-02-21 21:53:05) 168.138579 Received: Address 168.138579
cd030b91f7... Block 167848 (2012-02-21 23:03:03) 168.138579 Sent: Address 0