Actually the flicker issue depends very much on what kind of frame rate you're shooting at.
Yes, NTSC is generically known to be running at 29.97fps (generally accepted as 30fps), but most 'NTSC' cameras allow shooting at 24fps as a native framerate.
This is the framerate that matches actual film which is also running at 24fps.
I think 'NTSC' regioned cameras have two sets of advantage...
1) shooting at a framerate of 24fps, which is close to 25fps.
2) shooting at a framerate of 30fps.
Regular PAL regioned cameras only allow 1 framerate....25fps or 50i.
Similarly given the many questions & problems raised....you'll face similar flicker issues when you bring a PAL based camera running at 25fps to 60Hz countries like US, Japan, Korea, Philippines, etc...
Most web based video hosting sites prefer 30fps as standard.
http://vimeo.com/help/compression
Most computers, current TV sets & media players can handle both 30/25fps playback.
So generally, unless you have a delivery specification to adhere to, i doubt shooting at 24/25/30fps is going to pose a problem for the average video hobbyist.