Earlier this evening, my family and I attended the fireworks display at Fair St. Louis (downtown St. Louis), and viewed them from the third floor balcony at KMOX (which just so happens to be the first building after the Arch grounds, affording a beautiful view!).
Here's an embed of the video from YouTube:
The video was shot in HD on my trusty ol' Nikon D90, and turned out pretty well; I didn't do any kind of manual exposure, and the fireworks were pretty much properly exposed (which surprised me). It was shot at the wide end of my favorite walkaround lens, the 18-70mm f/3.5-4.5.