In reply to CWB:
Hi mate,
I sent the Harz guide (albeit a copy) to a guy on here called Gary in Germany (hope it was him!). Not too sure if it arrived, but he might copy it for you?
Best place, I think, with different grades is just down from the dam. Park next to the dam/shop/resturant and walk down the hill. You will see a large expanse of rock on the left hand side and there will be a trail down to it.
Good climbing and normally in the sun. A lot of the routes are in the forest itself so you have to find them first! If you are there for a while, join the local DAV
http://www.alpenverein.de/
Had great times with them using their huts, meeting people and going on trips. Good thing about the Harz is also langlaufing in winter. Lovely place and very historical as well as the West, East border guards were stationed there.
Viel spass!