Can I recommend this location for accommodation.
We went as a group of 4 blokes and had a room to ourselves. Plenty of room, good facilities, good location for some bars/restaurants and in a quiet/posh part of town. The staff are the most helpful you could wish for and value for money is the best.
Other runners were using the hostel and the UBahn station is only 50m away and easy to get anywhere, especially the HptBhf for the event itself.
http://www.jetpakhostel.diekurfuersten.com/