Spoke to my buddy who worked in Indycar and he say's the word is that Keith is doing much better but suffered some bad facial burns. Apparently when he fell, the visor on his helmet, which uses a small magnet fastener, popped open causing the injuries. I've linked to a video of the episode below.
http://www.youtube.com/watch?v=W2sIbTz-7cwAs you can see, they flattened the fire quickly, amazing how much damage can be done in such a brief fire.
As a footnote, Keith used to work for Andretti-Green Racing, and was part of Dan Wheldon's Indy 500 winning team a few years ago.
Fax