Yes that is more or less it. If for example you work for a company and have company based bookmarks - you could create a work network (like Yammer) and you can

Yes that is more or less it. If for example you work for a company and have company based bookmarks - you could create a work network (like Yammer) and you can then bookmark just like you would normally with say Delicious - add tags, categories etc. However other people in your company could join your network and you can then see what each other are bookmarking (it is social bookmarking but with a like minded audience). No one could see into your network except the members of that network. This could be something fun like a sports club based network where like minded people are all bookmarking useful sporting sites etc or it could work for a business who want to share work links.