Slick Tutorials has a marvelously easy tutorial on creating a vector sunburst. It's a text-based tutorial (no video, sorry), but is probably the best sunburst tutorial out there.
This tutorial does more than teach you how to create the sunburst; it gives you some terrific tips like these:
- Holding the shift key while using the transform tool will maintain a shape's proportions.
- Holding the alt key while using the transform tool will resize the image from its center.
The best part about this tutorial is that it creates a sunburst shape tool. No more creating sunbursts from scratch every time.
Check it out!