If you're a Flash developer, you may be interested in this detailed writeup on pixelconsumption.com. It explains how to use XCode as a Flash development tool, including creating a custom Flash MX 2004 project framework.
[robg adds: I won't be testing this one, given my lack of experience with Flash development. Hopefully someone finds it useful, though.]
Mac OS X Hints
http://hints.macworld.com/article.php?story=20040830085009966