It's finally out! Click there to go get the game - it's on discount for launch week.
If you haven't been keeping up with development/beta, there's a bunch of new content that's been added in for the Steam launch, including some new characters and a set of graphics for the epilogues. And yes, as requested, there are trading cards, so you can collect all the deaths.
But don't listen to me talk about it, go explore!
... can I sleep yet?