http://jalopnik.com/#!5780047/bmws-m3-nurburgring-taxi-is-in-sabine-schmitz-is-out Bummer. We were planning a trip to Germany sometime soon with this being one of the main attractions. My lovely wife (another blonde with a lead foot) was looking forward to this as well.
The Ring is still running and BMW is reported to be supplying M3s to replace the M5s. At this point the difference appears to be a change in drivers. I suspect with Sabine racing a Porsche this may have not made BMW too happy but they could have provided a deal for her if they didn't want her in a Porsche. You certainly should take in The Ring if you are going to Germany. Below is a very useful link for those headed to The Ring, including some forums. http://nurburgring.org.uk/
I think Sabine is every car enthusiast's dream girl. I would have loved to take a ride with her in the Ring Taxi.