Ivan is a prolific and creative entrepreneur - always interesting and passionate
Keith is an original and was there at the start of everything. He was the best investor and mentor I ever had.
Chat Center turns 3 billion mobile numbers into Chat Addresses - http://techcrunch.com/2014/09/18/chat-center-goes-freemium-as-it-passes-one-million-downloads/
He is an awesome full-stack engineer with especially good iOS skills too