Canon recently released several cameras with very low shutter lag and continuous shooting ability.
You can start you search with these:
I'm looking for a digital camera and I don't really want to spend more than $500 if possible. Since I have a new grandchild, my greatest need is a really short lag time between taking shots. (That goes for the camera and the flash) I don't want to miss capturing his everchanging looks. HELP!!!! Any suggestions please