Read New Posts feature?
Another forum I visit a lot has a nifty feature called 'Read New Posts' It selects all threads with new posts and displays a page with the top post heading of each thread where there's a new post. I find it very quick and easy to catch up that way. I was also thinking that in preferences you could choose which forums you wanted to display in the Read New Posts function. There's also a mark all read link on the displayed page.
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Steve