I've written a few articles over the past few years about Photographing Fireworks - it can never hurt to emphasize a point again so hopefully some of you will find this useful. In particular UK deviants might find themselves faced with a firework display this evening - the perfect opportunity to test out the tools within this article!
Tripods can be cheap or pricey. If you're looking for something decent, expect to pay a price! If you're unsure whether you can justify getting a tripod just to shoot fireworks then check out this article that I wrote - Tripod or Not? There's also a nifty DIY tripod trick you can try which I've written about here - but for fireworks, you need stability.