move PAL tvs work on 50hz, most NTSC work on 60hz
Just to clarify, tv signals have two fields per frame so PAL runs at 25fps and NTSC runs at 30. The Human eye can distinguish up to around 50-60 frames per second (depending upon the individual) beyond which we can't perceive a difference, so aiming for 60fps is a good idea for game coders.
As for the framerate thing, I use this tutorial and it works just fine for me:
http://www.bansheestudios.com/stuff/timerBasedMovement.html