Posterous launches dead simple group sites
You can now create up to three Posterous sites under a single account. Simply go to your main account page and click "Create a new Posterous."
To post to a particular site, just email post@sitename.posterous.com and it will go to the right place. Create a personal site for yourself, a family site for all your relatives, and a third site for your soccer team.
Each site can now have multiple contributers. You can add your friends or family’s email addresses to any Posterous site you control, and they can then email stuff in too. All they have to do is email post@sitename.posterous.com. They don't even need to register.
See the announcement on TechCrunch.

Check out this group blog Garry made so all his friends can share funny stuff we've found online (using our brand new group blogging feature).
Posted by Sachin Agarwal