Originally posted by EricT I have to agree with Aristophanes here, the best way to shoot kids indoors is using bounce flash. I typically shoot at f/5.6, ISO 200 and shutter speed 1/60s. With these settings, almost all the light comes from the flash, so you don't get trouble with mixed lighting temperatures or ghosting effects. A typical hotshoe flash has more than enough power to light up an entire room.
An aperture of f/5.6 gives you enough depth-of-field to capture moving kids which can be a challenge at f/2.8. Also, most lenses are sharp at f/5.6.
A little bit OT, but my favorite way to photograph moving kids indoors is with wireless bounce plus the on-camera flash. Set the large flash up for bounce out of their reach, and let the on-camera flash fill. It is sharp and effortless.
Back to topic, I'm also eyeing the Tammy. But I already have four zooms in that range....