Fantastic news! We're live (or will be, in a few hours). Many thanks to Desura for hosting our Early Access program!
Veterans, we're currently on the April 26th build. The Multirush update will be coming at the end of May! Stay tuned.
If you're a $25+ Kickstarter backer and haven't gotten your key, drop us a line at firstname.lastname@example.org and we'll get you set up.