I can't believe I missed this one.
So... the first thing that's popped into my head is that, since the whole point appears to be to post data about different cars so that people can know how it competes before they get one, or to compare different setups and such, or even compete, there MUST be at least some semblance of a common, known track. Not just the layout, but the type. Even those of us who only ever race on one type know that other types drive differently. The same layout in Scaley Classic and Sport will drive completely differently, not to mention Ninco or Carrera. Unless the track is the same type from result to result, then the results are meaningless, at least until the available results are complete enough to include multiple surfaces as well as cars.
I'd love to participate, or to find other people's results useful, but I would only be able to share results on Scaley Sport, and would only pay attention to results for Scaley Sport.
As far as layout design goes, I think it needs to be small and simple. Something that would come as a set and be likely to be easily made using spare track. It's only recently that I even have what I would call "spare" track, as pretty much every piece I owned was on my table layout. If it's a design that's common to sets, then someone who didn't already have spare track, or who ran on wood, but still wanted to participate, could pick up a set (like that cheap one recently acquired by many which then spawned this thread, I think).
I think you guys are on the right track. Keep going.