Keith Grinstein dies?!

I was at Open Coffee this morning and someone told me that Keith Grinstein died.   Here's the article confirming the fact . I didn't know Keith well -- but he was a real character in the venture capital / angel investing scene in Seattle.   He always seemed like a gregarious, outgoing, good guy -- he was known as a little wild and crazy but I liked that about him.  It's weird when peers start dieing unexpectedly -- he was only 48!  Makes me feel mortal.