One of the most interesting sites I have read lately is here - CollisionAvoidance.org. There is a ton of information about how our existing ATC systems work, how they will (not) work in the coming years if things don't get fixed, and a very elegant solution to fix them.

I have learned a lot in just a few minutes of reading, and I plan to spend more time there. I've also learned which transponder I should purchase for my RV8 - the Narco AT-155. Cool! I only hope this thing is or will be certified for use in Switzerland.