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.

f5e3b17a4d... Block 179806 (2012-05-12 06:51:58) 2.77964 Received: Address 2.77964
77a5998968... Block 179816 (2012-05-12 09:14:36) 2.77964 Sent: Address 0