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.

7e78d31896... Block 134977 (2011-07-06 05:56:05) 2.8 Received: Address 2.8
3db8a84166... Block 134985 (2011-07-06 07:23:08) 2.8 Sent: Address 0