I know, I know, I'm a total GOG.com evangelist (don't want to say "shill"), and this is one step closer to getting GOG.com games working on the Mac platform as well.
Valve has been sending images upon images to websites in the last week "in anticipation of an upcoming announcement from Valve". I think we'll see something from Valve this week at GDC 2010 (Game Developer's Conference). Can't wait to see what happens.
And then, I saw this today, and very nearly had to