I used to be a host, here in Edinburgh.

But I stopped after a few crazy-guests. Not horrible experiences, but enough to make me decide I had no desire to do so again. I'd often considered surfing, but since I deleted my profile it seemed a little cheap to look for a place to crash when I wasn't reciprocating myself.

These days it seems there are several alternatives to couchsurfing.com, with a less "corporate" feel to them.