In reply to Matt:
The Fränkische Schweiz is good, but unfortunately not in the area you specified. Elbsandstein is not to far from Leipzig. As far as the area you're talking about is concerned, you'll probably find the best climbing in the Thuringer Wald and, even better the Harz mountains - check out:
http://www.cehceh.de/climb/harz/harz_de.html for details (some in English). www.softrock.de has load of links to different German and European climbing sites. Obviously mostly in German, but some in English as well, if your German's not up to it. Bear in mind the special rules regarding pro. for climbing in bits of the former GDR!
Mail me if you need anymore info.
Cheers