Hi!
I am looking for a room in Madrid. Does anybody know where to find one? I am going to Madrid in 10 days and I plan to stay there for about 7 month. I try to find a room in a shared flat for about 200 €. If you have an idea where to find one or if you have one on offer, just send me an e-mail! Thanks!

I found this website while researching accomodation in Madrid. It may or may not be a paying service. Anyways, here it is:
http://www.roommadrid.arrakis.es/index.html
All the best!