Create website guides. Straightforward - give it some URLS, annotate them, ask guiding questions for each page and let people follow a course around the web. There's a whole rash of these doing the rounds at the moment. This looks on a par with the rest of them.
Socialbrowse - the easiest way to share and discuss links. It's a Firefox plug in. Save, share and discuss any pages with a single click. The Socialbrowse sidebar shows a real time list of activity from the people you choose to follow on Socialbrowse. Every time someone you follow shares or comments on a cool link, you'll receive an update. Sharing or commenting is simple - a single click. In fact, you never need to leave the page you are visiting!
Chat - Linkbuilder. Pretty basic ... a quick and easy, no-plugin-required
window where visitors to your site can talk to you or to each other.
Each virtual "room" has a unique tag that you provide when building the
link. If you use the same tag on two sites, you'll get the same room,
which can be fun for creating "webring" rooms shared by a group of
Swarm shows you what websites people are visiting, right now.
Swarm is a graphical map of hundreds of websites, all connecting to each other.
It updates itself every second with where people are going and coming from.
As sites become more popular, they move towards the center of the swarm.