OMG WTF BBQ
"Open Data is the idea that certain data should be freely available to everyone to use and republish as they wish, without restrictions,"
-- Sunlight Foundation: Ten Principles for Opening Up Government Information http://sunlightfoundation.com/policy/documents/ten-open-data-principles/
Don't have to create everything, just provide the data.
Once all data is being exposed, the next goal should be to provide in at least one well-known, machine readable format. Preferably these should be made available in bulk as that is the most common use case and will save server time/bandwidth in the long run. An API allowing access to individual bills, etc. is nice, but not as important or accessible as bulk access.
Suggested formats, in order of preference based on ease of use:
Please come to Mobile and Web Apps this afternoon!