Berlin has a great number of offers for loding, in many price/quality categories. Since it is quite easy for someone looking for a full hotel, here is a small list of youth hostels.
Hostels in Berlin
Sunflower Hostel – Helsingforser Str. 17
Close to S-Bahn-station Warschauer Straße (District: Friedrichshain)
http://www.sunflower-hostel.de/en/offer/rooms-rates.html
starting at 14,50 EUR
citystay Hostel – Rosenstraße 16
Close to Alexanderplatz (district: Mitte)
http://citystay-hostel.eu/en/rooms-and-rates.html
starting at 17 EUR
Odyssee Hostel – Gruenberger Straße 23
Close to U-Bahn-station Frankfurter Tor (District: Friedrichshain)
http://www.globetrotterhostel.de/?Book%20cabin&page=10
starting at 17 EUR
Wombat’s – Alte Schönhauser Str. 2
Close to U-Bahn-station Rosa-Luxemburg-Platz (district: Mitte)
http://www.wombats-hostels.com/berlin/rates-amenities/
starting at 18/24 EUR
The Circus – Weinbergsweg 1a
Close to U-Bahn-station Rosenthaler Platz (district: Prenzlauer Berg)
http://www.circus-berlin.de/prices.html
starting at 19 EUR
East Seven – Schwedter Straße 7
Close to U-Bahn-station Senefelder Platz (district: Prenzlauer Berg)
http://www.eastseven.de/rates/
starting at 18 EUR
Helter Skelter – Kalkscheunenstr 4-5
Close to U-Bahn-station Oranienburger Tor or S-Bahn-station Oranienburger Straße (district: Mitte)
http://www.helterskelterhostel.com/index.php?page=book&lang=en
starting at 15 EUR
Heart of Gold – Johannisstr. 11
Close to U-Bahn-station Oranienburger Tor or S-Bahn-station Oranienburger Straße (district: Mitte)
http://www.heartofgold-hostel.de/
starting at 16 EUR
Ostel – Wriezener Karree 5
Close to S-Bahn-station Ostbahnhof (district: Friedrichshain)
http://www.ostel.eu/en/accomodation-and-prices/
starting at 15 EUR
Pegasus Hostel – Straße der Pariser Kommune 35
Close to U-Bahn -station Weberwiese (district: Friedrichshain)
http://www.hostel-berlin-pegasus.com/prices.html
starting at 13 EUR
Hostels near Alexanderplatz
Night events will be at LEAP, near Alexanderplatz. There is a great amount of hotels there, which you can see with a simple google maps search.
4th international Pure Data Convention 2011 Weimar ~ Berlin