For the uninvolved citizen, they could visit the site and see that [something like] SOAP 2.0 is voted most important to watch. They could then cast their own disproving vote for the bill, which the site would track so that come election time a notice such as "Senator John votes in accordance with your votes 20% of the time."
The user could easily express their opinions, the site would remember their opinions, and would tell the user when their representatives did not represent them.
Personally, I don't know what bills are important, and even if I did I wouldn't remember how my Senator voted 5 years from now when he's up for reelection.