James Labe, at the Heartbeat Hotel in NY, seems to be considered the world's first tea sommelier.* Certainly he was thought to be the world's only as of 2000. But he's not the only one any more. The Mandarin Oriental in D.C. has one, and so does the Fairmont Royal York, right here in Toronto (Canada's only).**
* Enthusiastic description of a James Labe-designed tea.
** Thanks again to the anonymous Toronto-events commenter for pointing out to me that the Royal York serves afternoon tea; also, Second-hand description of how good an afternoon tea looked at the Royal York.