I have been told that's not how the process works - the Star Trek people certainly haven't had any luck on that one. I understand that, if, say, Paramount wanted a new series, they'd ask the professionals in the business to come up with a concept and then get a director to come up with a pilot.
This is, for the most part, true. And it makes sense; if you are Paramount and you want to do a new Trek series, who are you going to call? People you know, people who have worked for you, etc. But you MIGHT call up that guy who pitched a fan concept once to serve as an AD, or one of the writers. Not likely, but it has happened.
Again, I point out the career of Bryan Fuller. Sent in a couple DS9 scripts, which they liked, and produced. Hired on as a writer for Voyager. At that point, he had connections, a career and was able to (through his agent) pitch a few of his own series. They've all been sadly short-lived, but Dead Like Me, Wonderfalls and Pushing Daisies are among my personal favorites (generally speaking, critically well received too).
Now, this worked by him sending in scripts to a show that was already running, not pitching a resurrection of an old show. As I said before, the whole point to fan works is by the fans, for the fans. But if you, for example, did a fan Logan's Run series and pitched it to a network (after showing it to the fans), IF that network decided to do a series, there is a SLIGHT chance you might get SOME work out of it, because if you didn't pitch it, the network would not even know your name.
Bah, long rant. Sci-fi is fun!