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.

501e752146... Block 173013 (2012-03-26 21:11:23) 19.16709733 Received: Address 19.16709733
c0db157e16... Block 174054 (2012-04-02 20:59:18) 19.16709733 Sent: Address 0
980c209019... Block 181094 (2012-05-21 23:09:56) 2.16509733 Received: Address 2.16509733
9efec23fd3... Block 181332 (2012-05-23 22:11:59) 2.16509733 Sent: Address 0