Praying for the little guy. Brain damage is usualy the big thing in accidents like this, but it sounds like things so far are looking good in that area. I hope his infection clears up and that they can take him out of the coma soon.
My best friend has a little nephew that just started walking a little while ago and is now a curious lad himself. They've had to start useing two of those baby-stoppers setup ontop of the other now since he's figured out how to climb over just one.