Not sure if this is new - but I have not seen it done this way before:

We have just made it a lot easier to get the Teen Buzz ringtones on to your iPhone - assuming you have iTunes that is! Simply subscribe here and you will find the ringtones showing up as a podcast - once the ringtones have been downloaded they are automatically added to your ringtones directory and available on your iphone next time you sync your phone with iTunes.
More over at http://www.teenbuzz.org