How to Find URL?

I've been searching for a Mac URL sniffer, snooper, or finder. They're out there for PCs but I can't find one for Mac. What I'm looking for is a utility that will disclose the URL of streaming media. Any ideas?

Not so much a finder, but both VLC Player and iTunes display the url (not always), but you have to be mighty quick to catch it with iTunes.

Is it audio or video (or both)? In capturing streaming audio, I've sometimes had to use the Google process, ie. enter the name of the radio station and search, to get its url.

In iTunes or QT Player, use cmd+i to bring up the "Get Info" window, it'll show you the source's URL just fine.