Dreams pointed us to rockbox, an opensource replacement for the firmware for devices like the Apple iPod . Rockbox offers an alternative to the host device's operating system firmware (in many cases without removing the original firmware)
Tim Lord reported:
At last I can listen to the Ogg Vorbis version of Novell Open Audio podcast while trudging to the grocery store, and no one's the wiser that I'm listening to a format that's neither encumbered by patents nor vilified as a tool for ill doings. Bonus: it plays various other file formats, such as those naughty MP3s (so I can hear a download of the Penn Jillette radio program on the bus each day) and several others, including three lossless compression formats.