circles already in FB - called Lists
hi
I was quite surprised about this comment:
"Circles are basically sets of friends that you can drag and drop into groups mirroring your existing social circles ??? Family & Friends, Colleagues, Local Techies, etc. ??? rather than just the one big lump of friends you have on Facebook that can result in moments of ???worlds colliding??? since you have to share all of your updates with all of your friends. On Google+ you can selectively send updates to different circles, and you can also quickly click between the news streams of your different circles."
You can also group your friends in Facebook in lists and then specify which lists / friends cannot see a status update (lock next to "share" button). I have been using this for a long time now, if this hadn't been added to FB a while back I would have probably stopped using it. It might work different than the circles (haven't tried google+ yet), but it's definetely not true that "you have to share all of your updates with all of your friends".
On FB you can also use the lists to "filter" the news or feed, in case you only want to read the feed of one group/list (I don't use this one very often).
For the rest, it sounds interesting. Thanks for your article and information.