Very cool.
Shooting on film or digital?
I've done a lot of lightning back in my film days. I would set up on a tripod with a remote. Load the camera with very slow film, maybe ISO 40 if I had any on hand. Set the shutter to bulb, aperture to f22. Point it in the direction of the storm and open the shutter. Hold it open until you see lightning, then close it and advance the film.
Works best out in the country where there are no light sources but the storm.
Digital isn't quite as easy, but the basic ideas are the same. You just can't hold the shutter open for extremely long exposures. A few seconds at a time.
Works for fireworks too. July 4th isn't too far away, shoot some of your local fireworks display. Fireworks are good to get the feel for long exposure because you get a lot of chances to experiement with your camera settings, and you pretty much know where to point the camera.