Yup, I have a 75% off portal 2 as well. But I`ll only give it to actual polycount posters. No lurkers allowed (that meants you need to have more than 10 posts :P)
The 75% Portal 2 coupons are popping up everywhere to promote an update. I don't have a coupon yet (do already own the game though) but I bet i'll suddenly get a coupon if I log-in.
Bumping this thread because I couldn't find any better one, I got a 75% off Portal 2 coupon if anyone wants it. Totally forgot, steam ID is mr_nisse. To avoid having new people who just registered for free stuff, please post your steam ID in a pm or in this thread.