Saul Carliner teaches an excellent course on being a Technical Communication Manager.
I took his web-based certificate course, and thought it was great. For one thing, as opposed to some of the others I’ve taken, it was actually demanding. If you take it, be prepared to work.
Here’s a 6.5 minute interview between Tom Johnson and Saul about some tough issues that managers face.
See:
Registration for Saul’s Tech Comm Manager course
Tom Johnson’s site: I’d rather be writing