Currently I'm working on a plan to create a website that helps to facilitate people meeting up and sharing their skills/knowledge for a community education group. Hopefully it will help people to meet up in their towns/cities and start workshops/classes in whatever the participants wanted to do.

I'm quite sure that someone would have designed and experimented with this type of thing somewhere on the internet but I've been having a really hard time to find anything that even comes close to this concept.

The kind of website I'm looking for is one in which people setup profiles and search for 'members' that have skills or knowledge that they want to learn and somehow contact each other to share what they know http://www.hospitalityclub.org is a website that has a similar format but is mainly for offering accomodation

Also, does anyone know of any any radical/revolutionary/non-governmental learning-focused groups that look at using the internet for decentralised, grassroots projects?