"Americans can read, analyze, discuss, and vote on each bill that comes before congress." What about the cases where the full text of the bill is not made public until like 2 hours before the vote?
Bottom line is: Who is going to explain to constituents that the "Blue Skies Bill" is actually bad for the environment? Some Congressman may just be serving Big Oil, but at least they usually understand what it is they're voting on.
We can easily design a system that results in a "no" vote on last-minute legislation, and in the meantime, I believe the public backlash for last-minute legislation would be much worse with a system like Votesimple in place. Net effect: more transparency in congress.