Thanks to Chris for this post on his restiffbard.com blog, I have finally found an easy way to break it out into its own app. Simply fire up AppleScript (Applications -> AppleScript Editor) and enter this text:
choose color
Now, save it as an application (File -> Save As, and set the File Format pop-up to Application), and you're done! I copied the icon from the Digital Color Meter onto it to pretty it up. Add in the free HEXColorPicker from Lucky Software, and you've got everything a web developer might need to pick colors in any app.
[robg adds: As a final step, you might wish to assign a hotkey to your new simple application, making it truly trivial to access from any application. You can do this using Butler, QuicKeys X, etc.]

