Hey! I just joined this network. I hitched occasionally in Germany, Bulgaria, Greece, and lately a lot in Norway. I love hitchhiking, simply because it's the best way to get to know the people who live in the country, and it leaves some uncertainness and room for surprising experiences.
I have only little experience with long distance hitchhiking, mostly used it to overcome small distances (in my teenage years i lived in a village with 5 busses a day on weekends to the "big" city). Nevertheless, in Norway i hitched in April 2007 about 2800km from Trondheim to Oslo and back to Tromsø and the Lofoten. My longest ride in a single car was 1823km from Sikiá in Greece to Bad Tölz in Germany, not included the ferry from Greece to Brindisi in Italy. I hope I still get the chance to hitchhike a bit in Sweden before I move back to Germany.
From next summer on i might give you a ride myself, since we just bought a small van!