Some of the newer members might find this tip useful...
Click on the "FORUMS" link at the top of almost any page or here:
http://backyardtheater.com/forums/index.php?action=forumIt takes you to a list of the "forums" or message areas on the board. In front of each forum is an image of message balloon.
It will be dark like this

if there are no new posts in that forum. It will be lit like this

if there are new posts.
Clicking on a lit balloon will show only the threads with new posts you've not read in that particular forum.
I'm not sure how many days the system goes back when counting a post as "new" but there does seem to be a limit. If a post is older than X number of days it doesn't show up even if you've not read it.
I use this to find new posts when things get hectic during the busy season around here.
-Sparge-