Now, just like promised yesterday:
I talked to the people from Gewoba, and now it's fixed - I get the flat!
Here's a pic (sorry, it's quite big)
It's about 50m², 3rd floor with elevator, 343€ warm, got a kitchen in it, sleeping room is with wooden floor, living room with carpet and walls painted in terracotta. Big windows, though windows, loggia and the bath room are going to be modernised soon. Everything is bright and there's a lot of space.
The house lies directly next to a shopping center (not even 3 minutes to walk) and a tram stop. It's 20 minutes to the central station and about 30 minutes to the university.
The woman in charge for the flat from the Gewoba is going to send me the rental agreement this weekend, and then on tuesday I'll go to Bremen to get the keys :D
This is awesome..