I'v been doing exactly that with delicious for the last three or four years. Use a specific tag (or combination of tags, is you like versatility and modularity)

I'v been doing exactly that with delicious for the last three or four years. Use a specific tag (or combination of tags, is you like versatility and modularity) and then give to the people/group the url of the delicious page (or feed) for that tag. You can also use Feedburner (or Feedblitz) and make it available as a email newsletter. Nicola D'Agostino