Pretty much all of my shots have some camera shake, and yes I do often 'tremble' white a lot, but I also rely on being fast to get my photos, so that almost always incurs a stability penalty.
http://oh-hi.infoPentax has an ISO ramp function that directly influences exposuretime. Basically I set it to 'fast" iso ramp, that makes the camera automatically increase ISO more readily than it usually would.
The camera knows my focal lenght, and it knows I have chosen a fast iso ramp, so rather than use a reciprocal of the focallenght as the shutterspeed it uses twice that (iirc).
It works well at 70-200mm, and even though there is a soft-ceiling to how fast it will push the exposuretime on really big lenses, it still works well in conjunction with the shake reduction. eg: it'll still shoot at 1/250th with a 1000mm lens, which isn't ideal, but it still manages quite well.
300mmm or 500mm is probably the practical top of the curve as far as best-functionality goes.
I never disengage fast iso mode, I use it for everything. Night time is of particular value, even with wider lenses.
If your camera can't even auto-bias something that directly influences exposuretime, just always shoot at 1/500th and above.
