http://volunity.net is a site dedicated to support german and german-speaking volunteers who are serving a volunteer service abroad. General purpose is to link those people together so that they can easily share Stories and give each other support in difficult situations.
It also offers tools to keep in contact with friends at home. All members have their own Blog, can upload Fotos and reports, organize themselves in Groups etc...
The site is developed by Aureli.us, the NGO behind the Project is Grenzenlos.org.