Nader? Did you really ask why no one voted for Nader?
I know that independents have an uphill battle, but Nader is an angry, self absorbed little man who is trying to ride what little bit of political clout he earned by encouraging cars to have airbags or something and turn it into a political career.
Of course, by definition, independents won't be well represented because they try to speak for a broad spectrum of people, many of whom have left one of the two parties over a particular issue. Some feel that Bush isn't religious enough but find no solace in the Democratic camp. Others feel the Dems are too centrist and want to socialize health care and the economy and legalize drugs, but certainly don't find any in the Republican camp who want to kick back and smoke a reefer with them.
In that way, indies will always be that great mass of "up for grabs" voters. I don't see any solution to that. I mean, c'mon... Ross Perot won something like 15% of the vote. He wasn't qualified to be President and was barely worth his weight in soybeans, but did rally voters around the single issue of government reform. That was the political highlight of the indie movement in America, and likely the best they will ever do.