I took a quick look yesterday and couldn't quite figure out if I could limit my search to a specific forum. If the functionality is there it isn't as obvious as before. Btw, I wound up finding the answer to my question much faster with a google search. That's why I didn't pursue it any further.
edit: FOUND IT. (lol - I should try harder). Click on the search button (top right - just to the right of your member name). To the right of the search box you will see the word "everywhere" - click that - it's a pull down list. You can choose "this forum".