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.

fa0bc15084... Block 139192 (2011-08-01 21:53:32) 145 Received: Address 145
9fc5537c96... Block 139201 (2011-08-02 00:21:23) 145 Sent: Address 0