Originally Posted by brwrdrvr

This thread got me interested in searching for this type of stuff while grepping the network.

I found a great deal of software out there that might work for the OP's purpose. Might even work right on the hardware he has.

Google is a great tool.

Edit:

Even found some stuff to run on a *nix box and detect over the wire as well. Some of it has even been discussed in the forum before.