Quit Running?

So, I'm supposed to stop running because it is damaging to my knee.  Instead, I am supposed to be biking.  In the past two or three weeks:

• One close friend was mountain biking and broke four ribs, a collar bone and a collapsed lung (surgery)
• Another close friend was mountain biking and broke her jaw (more surgery)
• Julie was a candidate for jury duty. It was a case about a car hitting a road biker.

This is supposed to be the good stuff?  I think I might go back to running, perhaps with a suggestion from Tim Huntley. Take a look at Tim's blog entry.