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.

bdf2d21955... Block 176777 (2012-04-22 18:00:24) 1 Received: Address 1
6373005a99... Block 177709 (2012-04-29 06:15:41) 1 Sent: Address 0