http://fourwindsautismfoundation.org/kingofthestreets/newspost/keanu-reeves-adrian-brody-randy-couture-racing-for-four-winds-autism-benefit/

http://fourwindsautismfoundation.org/kingofthestreets/about/

Looks kinda official.

There is a very detailed filmography on this page but seems cut of at 2009. Weird...

I can't find in what kind of car he is going to race. I hope it's not going to be in one of those scary looking vehicles on the homepage!

BTW from the website:

We are in talks to have the event televised, and a live feed to our website so fans can interact with the event in real time - that should be a blast! The celebrity racers will negotiate, and bet one another each time down the track, just like a real street race, and the best part is that the money goes to the Four Winds Autism Foundation to help families affected by Autism.