In Prenzlauer Berg

TIC - General cultural Agenda

Museumsverbund Pankov
 - Energie aux Wilhelmsruh - Geschichte eines Berliner Industriestandortes (30/01/2009-31/05/09)

Miteinander-Füreinander Selbsthilfebegegnungsstätten - Senior organisation, seem interesting! Have an exhibition about constructing an apartment building in the early 1900's (info available there in English).

Kulturbrauerei
 Maschinenhaus
   Each Wednesday - Pater noster Impro-theater
 Kesselhaus - Concert venue

Prater Biergarten

Lichtblick Kino - Some movies in English with German Subtitles

Further...

Kreuzberg Museum - Some free parts, some paying
Museum im Wasserwerk 2,50 €/Person
Haus der Kulturend der Welt - English Programme - Some free events, some paying..

Tours and special activities
Spaziergänge im Berlin € - Seem to be experts in all kinds of tours in Berlin, literally tons of them!
20 Jahre Mauerfall 2009
Berlin on Bike €

Other
Fördergemeinschaft Ökologischer Landbau Berlin-Brandenburg  - Published a little guide to bio food in Berlin (which is in the guest room with the maps) . I think Abokiste means direct from the producer, which could be interesting in terms of REAL local organic food supply, by opposition to organic NZ or SA fruits and veggies.

Unclassified due to my poor German skills:
Volksbühne Berlin
Intro - A pop culture/Music magazine