I disagree, but, I"m in the minority I know. The non IS is a sharper lens. To avoid camera shake, just make sure your shutter speeds are above your length (200mm, shoot at over 1/320 on a 1.6x crop lens). I personally have zero problems at 1/150 for 200mm and 1/70 for 70mm. With a monopod I can get even lower. Problem for me is, under 1/60th or 1/70th of a second, I can't stop movement on stage, so I'm not going lower anyways. Just takes a steady hand. Get against a wall, a pole, use your strap, whatever it takes to have a steady hand. A monopod works fantastic.
Yes, the IS would be nice, but, I haven't been in a situation that I coulnd't overcome and get tack sharp images from my non IS 70-200L
Here are a few from a back in January that are handy, all shot with this lens, handheld, without a monopod.
edited to add: Ya'll notice that weird pixalation in the background on shot #2? Photoshop cs3 sure didn't downsize very gracefully in that pic
all of these were in extremely low light without a monopod with this lens (except the first one, shot with a 24-70)
http://taperssection.com/index.php/topic,99718.0.html