OMG. I've been waiting for them to do this for forever. I've got a pair of M13s, neither of which is totally functional anymore. I never realized how much I used the trackpoint until I had to switch to the one where it wasn't working.
I've had mine for a couple years. The trackpoint is not as good as the one on my lenovo, but it works and saves me from reaching for the trackball 95% of the time.