Nokia's John Kemp, at least within the Liberty Alliance, is one of those 'last name only' people. If he comes up in a conversation (and he does often, typically along the lines of 'I don't know how that works, who can we ask?'), people typically refer to him as 'Kemp' - as in 'Kemp would know'.
I don't know why - we haven't had a huge number of 'Johns' that would motivate such a disambiguating identifier.
Maybe it's the British accent that encourages some degree of social distance. But, he was a key contributor to the People Service, the key value of which is to decrease social distance.
Regardless, Kemp is blogging. And Kemp would know.