I would gladly welcome you on my "couch" in Bucharest, Romania, if you ever wonder out in these parts
I love the idea of couchsurfing (I met some dudes in NY who were into it) but I never looked it up cause I haven't been traveling too much so far. But it seems like a really good idea for meeting interesting people.
I'm also 22 and as soon as I have the money, I think I'll go for a trip around the US cause I loved it so much when I was there. Or maybe a tour of Europe first. Right now I'm going to France with a friend, for a 2 weeks trip which will probably consist of mostly Paris and a few other big cities.