I’m thinking the way to get going with writing professionally is to start writing ameteur stuff and get it out there (via blogs, email whatever).
Get feedback, the more feedback loops the better. There are heaps of technical writers whom I subscribe to that really just seem to be putting there very good ideas down for themselves, and then allow people like myself to read and comment upon them.
Having built a reputation as a quality thinker/writer if these guys published a book, electronic or otherwise, I’d definately give it a look.
To disclaim my position, I’m not a writer, just a guy thinking about getting into the game, cause I love thinking about stuff, and writing seems like one of the best ways to both record and distribute the product of my grey matter.
Good luck to us all … peace out :-D
