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.

89dc0184fc... Block 178312 (2012-05-02 22:00:19) 4300.6634699 Received: Address 4300.6634699
a2c85070fe... Block 178378 (2012-05-03 07:40:09) 4300.6634699 Sent: Address 0