From the Listen page, you can now access the list of public playlists. You can add a playlist to it by saving your personal playlist with the option to share your list with others turned on.
Directly, the page is http://www.nowhereradio.com/playlists.php
You can link to your playlist from other sites by adding ?plid=<plid> to the end, and replacing <plid> with your play lists ID number. Just do a mouse over on the page above to find out what your plid is.
This is very similar to mp3.com's 'Radio stations' which are really only playlists...
Have fun ;)