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.

058ec642c0... Block 167685 (2012-02-20 17:21:47) 0.09 Received: Address 0.09
ef7d1d57dc... Block 167688 (2012-02-20 17:50:04) 0.21 Received: Address 0.3
491c3f5b7c... Block 169547 (2012-03-04 03:10:03) 0.21 Sent: Address 0.09
488725ff20... Block 178152 (2012-05-01 19:52:35) 0.09 Sent: Address 0