I just spent three months writing a book. You probably noticed that by the updates.
I know plenty of great writers, who do tons of blog posts, documents and, yes books. During the time I was working on my latest book, a friend of mine wrote a novel TWICE as long and he's not even finished yet.
You probably have a professionally geeky book in you. A Geek 2.0 book. Something on both a career and your likely obsessive love of certain things. Maybe it's on how you made your video game career into a real one, or your observations of the six kinds of comic book artists, or whatever.
So write the bloody thing and be done with it. Promote professional geekiness by putting out a book.