I bought Left 4 Dead and Beyond Good & Evil on Steam today, thanks to some big price cuts (regardless of some jerks at Valve making us Europeans pay much, much more than we should). I got them for 33,74€, which is just a bit more than half of what I would have to pay for a retail version of L4D.
I'll also mention that I got Mirror's Edge and MotorStorm: Pacific Rift (both for PS3) as well as Professor Layton and the Curious Village (for DS) for Christmas. Excellent games, all of them.