Wow great stuff here! I've been taking wide images using my K-5 and DA 15 of the night sky trying to catch meteors. I got a few Orionids on Sunday morning and here's the best one (2 image composite - 1 for the meteor and 1 for the foreground which I light painted in one of the exposures).
I used the camera's built-in timer to take 100 exposures at 13s, f/4, ISO 3200.
The single exposures without meteors aren't all that interesting but if I stack them all it's pretty cool looking.
These posts have me intrigued about getting some kind of device to correct for the movement like that O-GPS1 but I'm a little confused at exactly what it does. I know it can geo tag photos but without a special robotic mount how can it compensate for movement when your camera is just mounted on a tripod?