This is a really good Facebook app. I like the ease with which you can create private groups. Blue Dot has this same ability - but I don't think we've executed as well as this. Blue Dot "Friend lists" are:

1) Hard to find in the interface
2) Hard to add friends to groups (esp if you have a lot of friends).
3) All you can do with them is restrict dots to them - you can't see all dots from that community, or use them to narrow a search.

Another brilliant thing about innerCircle, is they let you see more complete status updates and notifications from all your fiends. For some reason, they have to get you to copy and paste the RSS feed from facebook into their app (doesn't the API let them get this?).

They also do the converse - you can place an external RSS feed in their app (I put in by blue dot feed: http://bluedot.us/users/mike/rss) and they will generate notifications for your friends from that. This might work better than the RSS/Notes subscription I'm currently using on Facebook.

Quoted: Facebook is a social utility that connects people with friends and others who work, study and live around them. People use Facebook to keep up with friends, upload an unlimited number of photos, share links and videos, and learn more about the people they meet.