Do the cars do proper 4-wheel drifts with opposite lock? If so, very well done! I never managed that with ODE.
Not perfectly, but you could hold it for a second or two with opposite lock round the first corner after gaining speed down the final straight - this is my fave part of the track! Evak and I would quite like to recreate it in Max with a new 3D engine. I'm hoping the friction stuff works better this time. Again, we improved it, but its nowhere near perfect.
Also remember that with ODE and proper suspension that the wheels will bounce more than in Tokamak, and that in itself will cause friction problems unless you use splining techniques on the track :)
Also, I would imagine using addforce techniques and linepick, you could get a great suspension system in Toka. The same technique I used to get the ships hovering in our incarnation of FMC.
I'll go find that demo thread - I think you posted in it!
[edit]
http://www.blitzbasic.com/Community/posts.php?topic=58713#657256