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.

7e5b534135... Block 157710 (2011-12-16 07:20:37) 7 Received: Address 7
148e4f97a6... Block 157720 (2011-12-16 10:57:59) 7 Sent: Address 0