There is now a public version available for download at
http://bitcointrader.tempors.com if anyone is interested in trying it out. The market chart still needs a bit of work, but will be updated soon in a future version. Updates will automatically download at application startup from the web server.
It defaults to demo mode, but registration does work if you wish to unlock full functionality.
You will need to add an API key from your mtgox account in order to be able to trade, view your balance, or view account history (copy and paste the API key and Security key into the ApiKey and SecKey fields in the application). If you wish to register, you will need to give this API key withdrawl rights in order to send the 0.1 BTC registration fee. Once the fee is sent, you can disable withdrawl rights on the API key if you are worried about account security. Registration will associate full functionality with your mtgox account, so you can re-use the activation key it emails you on multiple PC's if you want to, but if you have more than one mtgox account, you will have to register the application on each account.
The "Connect" button will connect to socket.io and start up streaming of live public market data, which doesn't require you to enter an API key or security key. The 'Login' button will connect to account-specific data and allow you to view your balance and trade if a valid API key and security key is entered.