Here's a few "slot" links that I found helpful...
Slot Car Illustrated: http://www.slotcarillustrated.com/ A great resource and a bunch of great folks!
Old Slot Racer: http://oldslotracer.com/ Luf is the king of the "routed wood track"!
Slot.it: http://www.slot.it/ My favorite brand of cars and great parts to upgrade the other brands!
Fergy's Place: http://fergysplace.com/ Brian has some great schematics for drivers stations and track wireing!
Power Slotcars: http://www.powerslotcars.com/Default.asp A great place to buy your cars from! Cheap and fast!
Some other stuff I'm into...