The lottalinuxlinks.com linux user podcast has gone ogg only, and will no longer be producing mp3 files. You can continue to listen to the podcast by subscribing to the ogg feed or by downloading the files from the index page.
ogg feed;
ogg index page;
If you need a podcatcher that will sync to your portable device while automatically converting ogg files to mp3, then give gpodder a try.
gpodder;
If you need an ogg player for your computer, check out VLC.
VLC.

Getting started with Ogg.