We all have used a community of some sort. From java chat rooms o Irc chatrooms, to forums and bulletin boards. We have used Myspace, Facebook, Jaiku and Twitter.
One thing they all have in common, is community.
What type of community do you like? or what kind would you like to see again.
My favorite of all time was MSN chatrooms based on city/location. Lets you make the world a bit smaller and gets you in touch with hundreds even on a day you are sick. Forums are too slow but seem to be the closest we have. IRC even though msn chat was on an IRC server, IRC seems to vulnerable for massive attacks.
S what would you like to see again, or more of?