I'm the proud owner of an nVidia GTX 260, but I'm not a gamer. I bought the card to play around with CUDA programming, but I find myself tempted to see what kinds of great things a powerful graphics card can do.
I'm looking for recommendations for programs, games, or screen savers that will really show off this graphics card. The card is on a pretty reasonable machine (core i7, ssd, 6 GB RAM), so I don't think those will be a bottleneck.