I wonder how well that works for ports if the port was done by somebody else. I've been planning on picking up Bioshock for Mac, but today the PC one is on sale for $5 (and as much as I like supporting Mac software, that is a helluva better deal than paying $40-$50 for the Mac version). So, I wonder what companies like Feral or Aspyr plan to do about Steam. I know Aspyr has GameAgent, but really, they'd have to look at what they offer versus Steam and see which way the wind is blowing. Does anyone know any info regarding plans for porting houses and Steam?