Have some patience
It is possible a transaction will never confirm through
If the transaction was sent from the standard client, which pays appropriate fees, it should be confirmed within a few blocks max.
This transaction does not include a fee (.0005 BTC, for example), so miners are prioritizing other transactions in their blocks. The inputs to the transaction are also fairly new, which gives the transaction a bit lower priority. Don't worry though, this one should be confirmed soon given the low complexity of the transaction and non-spam quantity of BTC involved.