I vote often on VOTE.com as well.. I just don't think they have the impact that a PETITION does, simply because the "VOTES" are routed to our elected officials for which I usually recieve a canned response via e-mail, explaining that they are "sorry they can not answer every e-mail" which is really a bunch of garbage, because we all know how easy it would be to generate an AUTOMATED response that actually responds to the issue..
FReegards,
David