The two reasons I bought my Palm Tungsten T3 were the bright display, and the ability to listen to Podcasts and other audio content.

The built-in RealOne Player is not really useable. It misses bookmarks, and when operated without the stylus, the volume adjustment is too coarse for headphones. So I switched to Pocket Tunes. Another program you'll need is Card Export, which makes the SD card available as a USB drive under Linux. Hopefully, the next version of pilot-link or gnome-pilot will allow files to be installed on the SD card.

Finally, some MP3 files have to be converted to a different sampling rate, as the Palm does not support the 24 kHz used by Adam Curry. So I extended the mp32ogg script and added the switch --only-resample which will only convert the file if resampling is necessary. Usage example: mp32ogg --delete --only-resample *.mp3 will give you a directory with playable MP3 and OGG files, which can then be installed on the Palm. The modified script can be downloaded here.