Where's Ethereal? It's Now Sniffing the Wire Like a Shark:

"Wireshark 0.99.3 is the latest version of the project formerly known as Ethereal and includes a number of improvements over its predecessors. It also includes a few serious bug fixes that could have potentially represented security vulnerabilities. "

I've downloaded the source code for wireshark, and am compiling it right now. Fink doesn't seem to have a package for it yet.