While details are small, GOG has added operating support for Linux. The specific distros they are working on for compatibility are Ubuntu and Mint, with promise for 100 titles roughly ready for the support this fall. For more info check it out: http://www.escapistmagazine.com/news/view/133015-GOG-Adding-Linux-Support
Awesome to see more digital storefronts on the uptake with Linux support. Seems like valve really started the ball rolling here and they had enough influence that the momentum is continuing to pick up and make Linux a viable gaming alternative.