Cyclescape is a new campaigning tool due for official release fairly soon. It's already 'out there' though so why not have a look around? You can find it here: http://www.cyclescape.org/.
There's a blog (http://blog.cyclescape.org/) that explains the rationale and functionality (computer-speak for 'what it does'). Basically though, you create an account, add issues to a map, see other issues on the map, and drag an area on the map you are interested in. You can find out what other folk have logged and respond to them. All good stuff, and there is more coming - we should be able to see reported accidents, planning applications, chat about issues etc.
In the future we'll hopefully be able to embed the Cyclescape map of the Leeds area within this website so we can all see what's going on. It has the potential to be a really effective resource.