Nice! Go go gadget update!
Animations are in there now for virtual desktops. Woot!
They also have a new option in the builds to toggle between "Fast" and "Slow" updates. Fast means that you get the new updates the day they come out, and slow means it will take a bit more time. Personally I'm leaving my desktop on Slow, but my laptop will be on the Fast train.
What does "take a bit more time" mean?
Once a week?