Impulse Phase 2 has gone into beta.

To get it, make sure you have the latest version (just open up Impulse).
Then go to preferences by clicking on the Stardock orb and choose "use Impulse betas" to get access to the latest/greatest editions.
Better. Stronger. Faster.
NOTE: The beta build removes the Impulse dock. We are going to release the Impulse dock as a free download later this week. This way, people who don't want the dock don't have to deal with it and the people who want it can get it.