Been doing some experiments with my new toy, the {fairly} new Canon 320ex flash gun. I'll be doing a full review once I've used it a bit more, so far I've been mightily impressed. Its a very nice tool indeed.
The following are a load of long exposure pictures {30 secs} mainly taken out in the peaks. I used the LED light on the 320 to do the light painting and the trigger function to set the camera off.