Chip,
We've got the DL1 and a GoPro and I've found a reasonably economical way of producing the videos (like this -
http://www.youtube.com/watch?v=aJhM2aw70Ts)
Our setup is reasonably simple.... we take the brake switch and use it to light up a small LED in the centre of the dash (you can just see it below the middle dial in that video), then that same brake switch sends a simple on/off signal to the data logger. There's also a little LED in the back window for the rear camera! So, to sync, I simply bring up a graph display from the data and move the picture along until the I get a spike on the graph, easy!!
I've been using RaceRender to do all this, which only cost about 25 quid for a copy and you can import a range of graphical displays. It's much more cost effective and easy to use than the twoddle Race Technology try and sell to you.