Woolburr wrote in post #2387298
There appears to be nothing wrong from a sharpness standpoint in that image. I think you need to read the manual, familiarize yourself with the controls and functions...and shoot lots of pictures as a form of practice. The number of keepers will go up with practice.
I agree with this. In the 30D and the 17-40L you have some SERIOUS gear to take some awesome shots!
So DEFINITELY, read the manual, understand some basics in aperture/shutter speed, lighting, metering, ets...and practice.
Again, have reasonable expectations under those lighting conditions! Perhaps for your purposes the 14-70L wasn't exactly the best lens for the job. Something that can handle low light better might have been best. If you are willing to sell the 14-70L, spend another $300 or so, then might I suggest the EF-S 17-55 f/2.8 IS USM. It's not built like an "L" but sure takes pics like an "L"! With constant f/2.8 and IS you will have MUCH more success indoors.
Anyways, don't let things frustrate you!
Get a tripod while you are at it!!!