Good to see that this is now an Open Source effort.

Current Bounties (paid by me)

10 BTC - Set up a live demonstration site [PHP]
15 BTC - Fork PHP and do spring cleaning (waiting for public post w/information, pmt. address)
15 BTC - Back Office / Administrative Development [PHP]
15 BTC - Add Exchange Support (bitfloor / bitstamp / btce) [PHP]