Well then, let's see what we can come up with. My suggestion is a one-off event in 2006 that everyone can look forward to.
As a completely random suggestion I'd simply break classes down to the age of the car designs, ban all magnets and leave the competition element in the background...
Pre-war sports cars (bring out your Scaley Bentleys)
Pre-war GP cars (MacPinches and so on)
Sports cars 1950-1960 (my, there's quite a choice these days if you've got £100 to burn)
GP cars 1950-1960 (Scaley, Cartrix, MacPinches... you name it!)
GT/Sports cars 1961-1970
Scalextric Vanwalls/Maseratis (easy enough starter class)
Scalextric GT40s (ditto above)
SlotForum Proxy F1 class
Of course if it goes down well enough then maybe there'll be more of them, but rather than get into whats, ifs and maybes I'll ask around a bit first and see if we can't do something interesting first off. More to follow.
Hopefully much more!!