For if it interests you, I'm redesigning the 'community plugins' plugin, more to something based on photographers, but non the less.

What I have now:

• Users can stat a project, add a moodboard
• add categories
• Others search between the categories to find a project in their genre
• they can push a button that they want to collaborate
• Owner can close the project by stating he found collaborators
• Add the collaborators (so that they are visible on the projects page)
• Owner can upload the review about how the cooperation was and attach a Hypegallery to it to show the result to the audience
• they can rate the collaboration (stars)

In case that sounds interesting, you're always welcome to help me with it.

@Krischan: Deadline reminders would really be nice. When people do NGO work in their free time, they sometimes lose track of their commitments ;-)

@Dries: Yes it does sound interesting! I still "need" a task mgmt solution though :-)

@Krischan: Ok, I installed Lorea and it does indeed work. It's workable, but it would be nice if tasks could be as easily defined and assigned as in Confluence (which has its own little quirks).