Social network websites
The LinkedIn stuff is more about work history than friendship but the Facebook site seems like a nice step up from the limited information you can put on QRZ. If you've not considered these sites before, take a look!
Amateur radio operators travel to far away and exotic places to communicate with other "hams". Such an expedition is often called a "DXpedition", an expedition to do distance communication. The "100 pound DXpedition" describes my quest to do these DXpeditions with a minimum of equipment and maximum fun.