In prime time alone.
Multiply that by the number of channels out there (I'll let you count them up) and there are hundreds and hundreds of shows out there. Who has time to listen and watch that much TV? No one, that's who.
In comes Tunefind.com, a website dedicated to finding music from TV and movies. I think the main point of it is to help people find that song they just heard on CSI: Miami or whatever. Cool idea actually. However, when I saw it, a whole other way of using the website occurred to me.