A special feature of the new forum is the Expand/Collapse option.
With so many new categories, and even more to come, it makes for a rather large main page.
On the main page, next to each category, you'll see a small button (

) that looks like a minus sign. If there are categories that you might not be as interested in as others, you can simply click on the

to "Collapse" that category. (Try it and you can see what I mean.)
Once you "Collapse" a category, you'll only see the name of the category, preceeded by a

image that will allow you to "Expand" the category should you want to.
I hope I haven't made this more confusing than it is. It's really a very simple tool that might help you while you're here.
Thanks,
Greg