That is a good list, but,,,, some of those forums - such as wicked fire - strictly prohibit having links in your signature to other forums. So if you own a forum, and want to use some of those sites to build links, be sure to read the rules BEFORE you sign up and start posting. I signed up at wickedfire, and then saw their rules about links to other forums in your signature. Even though the forums I was linking to were a computer gaming site and a camera forum, the rules said it does not matte. No links to other forums, period.
FYI, since this is in the link development area, quite a few of those are no follow. Do some research before you sign up to mass promote something, and as ~kev~ said, read the rules