I thought I might see these guys when I was in New York, but not in Colorado!
My family and I were driving home after lunch yesterday and saw a very unique Subaru Outback: it had hoses, beacon lights, dish and Ghostbuster logos everywhere! I found a few pictures on the 'net, and it's exactly what we saw: http://www.myspace.com/coghostbusters.
The guy driving looked a lot like Dan Akroyd, too! I'm still not sure if it is just a fan car, part of a fan film, or if these guys really do try to chase down paranormal activity...
Still, it made me want to listen to Ray Parker, Jr. for some reason... :-)