I'm starting early as my last flat search was a nightmare and I have particular criteria!:

We're looking for a quiet, child-friendly 3-4 room apartment in Neukölln or Kreuzkölln.
90 sq m +
Altbau preferred
Secure
Not too many stairs / lift
Central heating
Ready(ish) to move in

North Neukölln around Schillerkiez, Hermannplatz, Hasenheide
Kreuzkölln around Graefekiez, Schönleinstr

Looking to move latest beginning of March 2010.

PM me if anything springs to mind!