I'll definately be at Wacken! And Sonya's coming as well, as far as I know.
CHEAPEST WAY OF TRAVELLING BY TRAIN IN GERMANY:
So-called "Wochenendticket" at the weekend (5 people, about 30 Euros, only regional (=RB, RE) trains, valid for the whole of Germany, and ONLY FOR ONE DAY, NOT THE ENTIRE WEEKEND!!) and on weekdays, there's the same thing, but they're only valid for one "Bundesland" (one of 16 parts of Germany). For your information, Wacken is in Schleswig-Holstein. The Schleswig-Holstein Ticket is also valid in Hamburg which is a Bundesland of it's own. For the regional tickets, there are also version for one operson only that cost only 15 Euros.
Edit: Just found out: Schleswig-Holstein Ticket is also valid at the weekend now.
Ralf:
You'd need a Niedersachsen ticket. Hannover is in Niedersachsen, and the Niedersachsen ticket is also valid in Hamburg. The Niedersachsen ticket is, however, not valid at the weekend. (-> Wochenendticket)
Any more questions?
Or did I completely confuse you now? Hope I didn't...
In case you wanna find out more:
http://www.bahn.de/-S:PtVOZ9:d6c,rd...al/englisch/travelservice/price_tourist.shtml
@ Taliesin: It's gonna be my fifth