Micah-- exactly. Thank you for reminding the people with short political memories about Jerry Brown, who 12 years ago was the first $100 candidate. So that day was upon us, not is. This is like at blogging confabs when Dave Winer says "someday the media and politicians will start reading blogs!" Duh.
Whatever is the problem with the $2000 limit? Hey, Alan Solomont and Laurie David are citizens, too.
Now when people say "special interests" they often mean PAC money. John Kerry's PAC intake was $141K George Bush's was $2m -- these were less than <1%. But someone would be a fool-- sorry, someone posing as a political populist-- to suggest that "special interests" are going to disappear overnight.
Following the money in this case ignores the more fundamental needs.
I want a candidate whose organization responds to every request/question that is asked (online). And this can either be done by (A) central committee and core staff (B) far-flung volunteers or (C) accountable, hierarchical staff/volunteer structure. Traditionally we've been at (A), and with some of the 2004 campaigns we might have seen (B), but I think ultimately the future is at (C).

delicious
digg
technorati

I think the expectation is a bit off the mark
I don't think that person will be either an incumbent or a candidate.
I believe that person will be none other than Ms. Oprah Winfrey. She will do for political fundiraising what she did for publishing with her Book Club recommendations.
She has officially endorsed Barak Obama and is hinting at doing so with other people across the country. If anybody can pull off that kind of fundraising, it is certainly Ms. O.