Finally got the trackside video posted:
http://vaughanscott.com/videos/ARRC_ITB_Trackside.mpg

It's big and long (188Mb/10min)... all shot from the paddock, pits, and front straight. Does show the start, checker for the first 6 cars, and the tail end of the front straight incident.

I'm still holding out hope that we might recover the in-car, but it's pretty unlikely...