Nothing huge, just hid most of the forums that are no longer in service. It is all still there, just removed the eye clutter. Survey says that most new people get confused when there are so many forums floating around so figured it was time to start hiding the ones that are slowly being removed due to the V2.0 upgrade. For the most part, you shouldn't really miss anything.
If you absolutely need something out of there then just let us know and we can make it available. I can't think of much that would require that, but the offer is there.