Create online noticeboards as hubs for community ideas
Show community groups, networks, individuals how to use a service like wallwisher to make a free online open-access pin-board for their area. This is a great way to publicise what you are doing/thinking/planning, and for others to see at a glance everything that's happening around them.
John Popham commented
There are a number of ideas in this sphere which we could do with aggregating, including http://johnpopham.wordpress.com/2010/08/15/big-society-community-noticeboards-part-4/
Interested in this, although here in brighton the amount of activity already around is fairly overwhelming - would be nice to have a searchable/filterable "portal" that aggregates all the feeds available. Would anyone be interested in taking this as a "starting point", or even just kicking some ideas around?