How do you get well known?
First, get involved, post your thought. You won't get known if you just read
Second, have a general "sig" in your post. By that I mean talk in a similar style. People will associate something in your posts about you.
Third, don't do anything stupid. You'll get well-known, but for the wrong reasons and that's bad.
Fourth, start small. Work from one forum and learn about the people in it and slowly spread.
These are just some of my ideas. I don't necessarily followed them, but you can try.