e-Government citizens' oversight source code
The Sunlight Foundation’s Apps for America contest was a very cool thing - I especially liked Filibusted - the ability to track politicians who block policies in the house is invaluable.
However, this is not primarily what I am interested in - I would love learning how to architect GovTrack, which is what enables ALL these websites and applications.
Architecting data on the government’s side is the hard part - creating mashups at home is the easy part.