I tried my hand at some fireworks photos while we were at the Magic Kingdom. Here are my two favorites. I think the first one looks like pixie dust being sprinkled on the castle.
For photogs, my camera was tripod-mounted using a 2-second timer (use a remote if you've got it, though) and my settings were ss 3, f/10, ISO 200
Also thought I'd share some snaps from the Festival of the Lion King show at Animal Kingdom. We had great seats so I was able to get up close & personal with just my 28-75mm. Settings were ss 1/320, f/2.8, ISO 2500.