I had trouble installing and running Ethereal on OS X with Darwinports. I know many here prefer Fink, but I wanted to use ports myself.
Thanks to MacOSXHints, I was able to solve my problem, and created a 'How-To' on my blog at jackburton.blogspot.com
Hope it can help some other people who were trying to do the same thing.
Mac OS X Hints
http://hints.macworld.com/article.php?story=20040624213407155