I always worry anytime anyone uses the word "progressive" in the context of politics.
Thats just a euphemism for "socialist" or "marxist"
In the case of "America Votes" you should have little alarm bells going off in the back of your head.
They are affiliated with
21st Century Democrats
ACORN
Sierra Club
Association of Trial Lawyers of America
MoveOn.org Political Action
To name just a few
http://www.americavotes.org/coalition/index.aspx?catID=8
I'm on the E-mail list for a number of these organizations. Got to keep an eye on these guys.