Here's another interesting "radiation enthusiast", who visits nuclear sites and collects radioactive memorabilia. He actually works as a nuclear engineer.
While we're onto nuclear enthusiasts, this is a great slightly-tongue-in-cheek (or possibly entirely serious) blog about nuclear science and fashion and stuff:
http://rose-blogg.blogspot.com/
http://carlwillis.wordpress.com/
Highlights include Chernobyl trips, a trip to "Soviet Ground Zero", and a how-to for DIY uranium chemistry.