Throughout this trip I have used the services of both Hospitalityclub.org and Couchsurfing.com - And while both services offered pretty much the same thing, couchsurfing came with a better interface and a more relaxed attitude towards travel. I was so impressed with the free service, a couple of weeks ago I donated $20 AUD to the Couchsurfing cause. However, for the last few days the site has been down and I haven't been able to use it. So today, I went to check out my chances at getting some Couchsurfing action in Linz, only to be greeted the site being down and a rather dramatic open letter to all couchsurfing users.
See it at www.couchsurfing.com