Third parties will never have a significant presence in federal offices until some kind of electoral reform takes place. The fact that, under the current system, a divided vote can result in someone the majority of people dislike being elected will mean that a significant number of people will never vote for a third party. And their position is not completely without merit.
Third parties are insane to try to run presidential candidates in this climate. It's a total waste of time and money. They talk about raising visibility, but has it worked? Third parties received barely 1% of the popular vote this last election. Even Ross Perot, that creepy, crazy old man, got 19% -- his siphoning of votes changed the result of the 1992 election, and people know it. They've learned their lesson about divided votes. Third parties won't be major players again.
That is, unless we adopt instant-runoff voting, or another modern electoral system. That is what independents should be focusing all of their time and money on. Running candidates just wastes their money, and makes them look dumb. People see Nader or Badnarik or Cobb, and they don't say, "Ah, the saviors of the American republic!" They say, "That guy says he wants to be president. Isn't that cute? Bless his little heart!"
They call it "grassroots" because you have to work from the bottom up. At least, I think they do.
Jeremy