Steam Summer Sale
Yup, it's started, if you can get past the error 503s. Of course, none of the deals are any good, so let's wait and see. . .it really seems like GMG is giving Steam a run for its money right now.
For example, right now Bioshock Infinite is the same price at GMG, but you can also get a further 20% off with a coupon. Steam really needs to step up its game.