I found a good place to play free online games - it’s called Excessively.net. They have a bunch of games converted to Flash, so you can play classics like Frogger and Arkanoid (well, a clone) along with some I’ve never heard of - “Boobs, Butt, or Shoulder” and its sequel, “Boobs, Butt, or Shoulder Part 2!” But the real attraction for me is the NES games. They have the first three Super Mario games, and although the emulation is a little slow they do seem to play pretty well. If you can’t install an NES emulator on your computer - like if you’re at work - then this is definitely a good way to pass the time. (But I don’t recommend playing Boobs, Butt, or Shoulder at work.)