I added support for BTC Guild. The information displayed for BTC Guild right now is:
- confirmed reward
- total hashrate of all workers
- total shares of all workers

I'm already thinking about how I could make the information displayed customizable. What I thought about doing was to add an option for an API Key for each pool and then the user could chose an information to display in each one of the four spots. For example:
Spot 1: [BTC Guild] confirmed reward
Spot 2: [deepbit] - confirmed reward
Spot 3: Exchange rate
Spot 4: Difficulty
What do you think about that?

I would be very happy about feedback for the BTC Guild support since personally I'm using deepbit at the moment. I will publish the source code as soon as I cleaned it up.