I've been having students who are enrolled in the Internet course I've been teaching this semester give short presentations of sites or services they've particularly enjoyed or found useful. One student gave a brief presentation on using Google's intitle syntax for finding MP3 or other media files, when you can't use one of the services that locate these files for you. He said it was particularly useful when those services are blocked by a firewall or some other filter at your workplace.
Here's an example of what you can enter into Google's search box to show a directory listing that contains mp3 files whose names include "emmylou harris"
?intitle:index.of? mp3 "emmylou harris"
When you use intitle:xyz you're searching the titles of Web pages. Try intitle:cpsc104
I found some other interesting comments about using intitle, several of which were related to security issues.
Googling up passwords http://securityfocus.com/columnists/224
Google Your Site For Security Vulnerabilities
Demystifying Google Hacks
Google hacking at its finest..
And today's special is ..
You're enough to keep me awake nights.