When I asked him about his and Udi's departure, Ruben sent me this statement:
I was CTO from inception to September 2005.After John Battelle broke the story, A9 CEO Udi Manber's departure to Google is being widely reported in the news media.
I returned to Seattle and Amazon.com because after 20 months of commuting weekly between Seattle and Palo Alto felt I was missing too much of my children's daily lives.
It was a great job and I highly recommend being a CTO of a small growing company if you get a chance :)
I was quite surprised by the news of Udi leaving. I knew we were doing executive level recruiting, but I was under the impression we were looking for my replacement, not Udi's.