I am excited to announce that Tor has agreed in principle to publish a Best of InterGalactic Medicine Show Vol. 1. The book will include stories from the first four issues of IGMS, including all four Ender stories by Orson Scott Card. (Yes, I know you're all still waiting for the Ender story to go into issue four, but I promise he's working on it. An announcement about that will be made shortly.)
Details regarding the timeframe of the book and the stories to be included will be released as they are finalized with Tor.