I was fortunate enough to get a front row seat at last weekend's airshow at Ellington Field here in Houston. Weather was perfect. Had my Canon 40D and 70-200mm f/4L IS lens with me. Really wished I had rented a 100-400mm lens, as 200mm is not much reach. I had to do a lot of cropping in post in order to get some of the planes to be large enough on screen.
The only bummer was that the Blue Angles went on late, and I had to leave before they went on.
Here's a link to the pictures. Enjoy!