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.