As far as I know some celebrations. The biggest should (as far as I know) on 9th November, where the wall should symbolically fall again (
http://www.mauerfall09.de/en/portal/...-november.html). All information can be found there.
If you are in Berlin, I highly recommend to visit the open-air exhibition at Alexanderplatz (open 24/7) about the events in the GDR before the fall of the Berlin Wall.
Cheers
757DUD