There are a wide variety of Usenet service providers, including universities and colleges.
Here's an excerpt from Usenet.Com's Mp3 Newsgroups Page:
Today’s hottest way of sharing MP3 files over the Internet is Usenet; forget about all the peer-to-peer software applications, which quickly become outdated. . . . MP3 Newsgroups are the ultimate way of sharing as they are well organized and allow the users to find what they are looking for quickly and effortlessly.