I had a similar experience on vacation last week. We drove through Ohio, West Virginia, Virginia and North Carolina. We started counting Bush stickers versus Kerry stickers. Bush 31, Kerry 5. Also just around town here in Ohio, I'm seeing many more Bush stickers then I did in 2000. I saw more Gore stickers in 2000 then I've seen Kerry stickers thus far.
In Atlanta I saw so many leftist bumper stickers - my wife had to stop me from confronting a b*tch who had one that read "Our grief is not a cry for war" (I was working in Manhattan on 9/11, a guy I grew up with was one of the firefighting heroes).
I'm from liberalish suburban NJ and I have never seen as many limousine liberal bumper stickers in one area ever as I saw in Atlanta.
By contrast, every place else I went had tons of Bush/Cheney stickers.
I tend to believe this is a good indication. During 2002, in Maryland, I saw many more Erhlich stickers and signs than KKT. Then, the last week or so before the election, KKT was still trying to get her base together in heavily Dem counties. I think the bumper sticker and yard sign sightings are key indicators in this election.