For the photohounds out there, I was using a Canon 40D shooting mostly ISO 1600 (pics are a bit grainy) to keep the shutter speed up. The clouds rolled in & out plus I was shooting into the Sun, so the light wasn't the best. Also challenging was trying to capture the rocket as it left the pad; it goes FAST. But a few decent pictures that capture the moment ... or milli-second!
If you want to see a time-lapse animation of a launch ("there it goes - straight up!"), check out launch sequence 1 and 2.