I like it when the inverse happens too -- I was in stop-and-go traffic in my car on the way home from work the other day and I saw a motorcyclist in my rear-view mirror safely lane-splitting up to me (i.e. not being a dick by going super fast and weaving around). I was in the left hand lane and pulled as far over to the left as I could to give him room. He gave me a nod and a big wave as he rode past. I really appreciated both his safe lane-splitting and the wave.
