As a newbie I hope I'm not opening up a can of worms here, but is there a reason (I'm guessing yes and it has dead presidents on it) why there are no Lucas Arts games on COG?
I have no idea what COG is, other than potentially the singular version of an indie game I got recently. :-p
Regarding GOG.com, they don't have any yet because they have to come to agreements with Lucas Arts. As of right now, there has been no announcement of finalization of an agreement with them. Keep in mind, Lucas Arts was recently purchased by Disney, so that probably means complete renegotiations and the like.