Truly amazing. I love how things like the GL lighting has been simplified. And the physics engine will open up a TON of new possibilities.

The new dropdowns, with additional interface objects (like a checkbox) to the right, are these just new examples of umenu? They look so handy too. I also love the "alignment guidelines" which flash when things are aligned horizontally or vertically.

Bravo...is really all I can say. Can't wait to get my hands on this!