Originally Posted by The1
also, if in doubt about the amount of noise you're getting in high ISO applications, print a picture on a 4x6 sheet, and you'll be amaized how little shows up compared to on computer, so if your moms business is printing images, it may be worth making some samples. however, if most of the things you are shooting online, then try to keep it in the mid to low ranges, and you'll be happy.... 1600 will be about the limit of acceptability on that camera depending how you shoot, and if you stick to raw.
ISO is something I need to play with a little more. I shot all the still shots of my buddy's Si at 100. Most of them came out pretty good (I think). I have to play around with it and see what works.