URGENT!! I need a room in a shared flat NOW!!!

Hello I'm a 20 years old student from Spain. I'll ve arriving in Berlin on Saturday 5th of July and I still don't have the accommodation so I'd like to see if someone could offer me a room in a shared flat which is situated in the center of the city, reasonably priced and with good connections with public transportation. for this dates: July 5th until the end of september 2008.
The reason why I'm going to Berlin is to follow an intensive german course in the school "die neue schule".
Please, anyone who could help me call me at +34697501179 or send an e-mail to [Email ukryty] and we'll talk.

Thanks.
Carmen