Couchsurfing: share your couch, roam the world

Nina who works with me pointed out this site called Couchsurfing. Its like a Fon but of couches. With Fon you share a little WiFi out of your window with those who pass by and then they share with you when you go by their home. With Couchsurfing it gets more intimate. You share your couch with those who pass by and they share their couch with you when you travel. Even though I am not sure I am ready to share my couch(es) with those who pass by my home I loved the idea.