Never realized he was deeply involved in JXTA. Used the JXTA project about 4 years ago and it seemed to be in a constant state of flux. Not sure what happened to it and if it's still being actively developed....was one of the better P2P frameworks at the time....
It's an old article from Netword World but it is interesting. I read it a while ago but I remember that was very informative in how William Yeager conceived the architecture of the multi-protocol router (which in deed I think it was the multi-protocol feature the big hit of Cisco over Wellfleet).