What are you talking about? I am not even sure what you think constitutes "plugging his new company." Mentioning that he is moving on to focus on his new company is hardly a plug. He does not even say "I am moving on to my new company, Farsight...", you have to get to his .sig to even find the name.

I cannot imagine anyone in such a high profile position writing that announcement without including a "what is next."