Hey, I have a crazy idea.
Lately, I've trying to think up ideas for IE accelerators for TF.
Quote Text comes to mind. If I'm looking up info on a site other than TF and I'm going to create a new thread, an accelerator could transfer the copied text to a new page which is setup to post a new thread. The new page will need a way to specify which forum to post in.
Forum Search. I found this idea on codeguru.com. A visitor highlights text. Then, activates the forum search accelerator and it preps the search page by transfering the highlighted text to the keyword box.