I will have to look. I found one site that a lot of information about the Oxigen system, as I was considering it, but it was just too much for my needs so I opted for Carrera. I am using the Carrera D132 chips in 143 scale so I don't find them too big. Here is one car I did and then the last picture shows the current 6 143 cars I have running on the D132 system
I really like the system and it has been nearly bullet proof through all of my hacking. However an open system free to all developers has a lot of potential.
For instance. You compliant about no computer interface. Any Third Party developer can build one if the market needs it. You don't need to wait on Scalextrics to come out with it. The protocol information is all there, all you have to do is design something to use it.
I guess the market for slot cars isn't as robust as other hobbies, as it seems getting advancement in digital technology is pretty slow and the primary reason this thread was started. I do believe though we will see a proliferation of Scalextrics equipment, once the the realization that Scalextrics has opened the door for developers. Anyone with an idea is free to design and build something, without having to wait on some large priority based corporate structure to make the marketing decision. There in lies the power of open systems
Cheers
Dan