We did some biking with the little girl today. I made some shots in action from my bike! The shots were taken at ISO 800. This returns an awfull lot of noise; almost useless if you want to crop it and show it real-pixes-size on the web! However, having a filter (find edges), you can make something colorfull of it.
There are tools to improve images like this. The drawback is that they remove a bit of sharpness. In the following part I show some examples.
I used a demo of Neat Image 2.11 to remove nois and got the following results (which is quite acceptable in some areas).
Another little advantage it that the neat image optimized file compress better (1.8x) as they contain less colours and less noise. The image is taken with a CoolPix 5700, ISO 800 on a sunny day. I used a demo of Neat Image v2.11 with the default coolpix 5700 profile.