I have the best job : among other things, I get to help cities (and states, etc) open source their software. Most recently, we worked with San Francisco Department of Technology to open source their Enterprise Addressing System — web-based software for managing the city’s master database of street addresses, tied to Assessor’s parcels and the City’s street centerline network.
See the blog post at Civic Commons  for more. Comments there, please, not here.
Unless it’s a comment about how awesome my job is. Then please post it here :-).
 I work at O’Reilly Media  on open government. Right now that means being largely seconded to the non-profits Code for America  and Civic Commons , helping government entities do open source.