Free classical music
Spoken Articles (Wikipedia audiobooks, as it were)

It's in Ogg Vorbis format, which can be annoying if you use iTunes or have an iPod. If the former, get thee to Xiph and install the quicktime components: you'll be able to play Ogg files in iTunes, but not yet on your iPod. For that, you'll have use iTunes's converter to make the Oggs into mp3s or AACs, which is a shame because converting lossy to lossy really cuts down the sound quality. (Sign the petition to Apple.)