I have completed a hack of our forum code that will allow users to find all new posts since their last login, ONLY in forums to which they are subscribed.

You can subscribe to a forum by clicking into the forum, then choose "Subscribe to Forum" from the "Forum Tools" menu near the top-right. Suggestion: On the next page, select "No Email Notification" - unless you want email notification whenever the entire forum receives a new post

All of your subscribed forums will appear in My TalkBass.

To get new posts since your last visit in only your subscribed forums, pull down the 'search' menu to "New Posts in Subscribed Forums"

Again, this is a code hack, so send any bugs my way ;)