So, my bro and sister have a guy surfing their couch right now. A really cool guy from Germany, that's cycling trough Europe and Asia.
We had great fun last days and I wish him all best. Check his blog here if you want -> http://www.berlin-hanoi.com/ (you can hear my drunken kung fu style talk in one of the videos) :)
So far from my own experience I really like couchsurfing, but I'm still a bit paranoid about all that. What do you think of it? Did you had any experience so far?