There's an HO slot car enthusiast group on Facebook that's pretty active. Content varies from old Aurora to current Autoworld and everything in between. Sometimes there are some links to other sites dropped in the discussions there, but I don't really have anything bookmarked that you won't find on google. I collect, but I'll drive all of mine. I have a few Magnatractions, Magnasonics, and G-plus from the 70's, but most of mine are 90's Tyco, Super G Plus, and Rokar/Lifelike. Well, thinking about it, I might have surpassed that with the Autoworld stuff. They just have cool subject matter, even if the cars typically aren't as good as older stuff.