There are tons of new features already mentioned in this thread
so I recommend starting there.
As for why the upgrade was launched here first, I think it's pretty obvious that they want to work out the kinks in the lesser forums before launching in the REAL Cafe. Kind of like how a restaurant will open its doors for a week or so before announcing their Grand Opening.
We'll be up soon. In the meantime, there's no shame in slumming it up over here on the Dark Side for a while. you guys know I'm kidding!