The notion is simply to tag people, well it’s not really, you can only put people in lists.
All you can do is add a person to the system, find them by the user section or if they are in a list (topic).
When you find a person, you can see an aggregation stream of their web2.0 content (blog posts, bookmarks, photo’s, etc…).
Another interesting thing you can do is add a bookmark to the system and tag it, and also associate it with a person.
I think Ziki is much more advanced and primed in this space…plus you can see an archive of personal feed content by feed type, and search it.
Most of all you can be in a group, but you can also tag yourself, in the future it may turn into a people folksonomy, where you can also tag other people.
Although I do like the peoplicious feature of adding a bookmark and associating it with someone, I guess it is a way of socially making up the profile part of a person eg. conferences they have spoken at, journal articles they have written, companies they worked for.
Check out the blog post on peoplicious for more.