Apparently,, as far as his campaign goes. His appearance in Portland, Oregon to get petitions signed for ballot access only netted a few hundred attendees. Many of whom were protesting against his campaign. The is from his website.
Though I am not ruling out third party candidates this year (I am still holding out for Libertarian Gary Nolan, if he can gain the momentum in time), I am certain than Nader’s candidacy is essentially doomed. And I think it is more from leftover anger at the 2000 election spoiler than anything else.