From a post on KS, the Limited Edition Phoenix Familiar is on sale now. It works with every edition of the game, including the GOG edition. Initially it was only going to be made available at PAX East, but they decided to sell it for a brief time as well. Figured I'd share it here in case any Moon Hunters players are interested. Estimated delivery is April 28th, according to the page, so the item won't show up in your email immediately.

How does this work? You get a code?

I'm interested... but confused. Anywhere where there is more info on this?

I'm not entirely sure how it is delivered. Here is the posting on KS. There is mention of "redemption codes" in that post, so I would assume that is part of it. However I would have to guess there is a patch coming as well, unless the add-on is already sleeping in the codebase.