The Poewar.com Writer's Resource Center has just about everything you need to know about writing and then some.
There is a great freelancing articles section, a very nicely categorized jobs listing section, and another jobs section with listings by state!
There is a lot more that I'm still checking out. I found this blog with the new blog search tool on the Google toolbar. I just put in "writing" in the search box and this great blog turned up.