Well this is kinda like a combo of Twitter and Facebook. You just follow people and they can follow you back. Also when you select a interest it matches you with other people that shares the same interest and you see each others post.
You are able to create articles which are like blog posts and you can also create regular status messages as well.
The Buddylist chat lets you talk to all members in one room or you can direct message other users by clicking on their name in the chat list.