Or for maps and relevant statistical information and useful links try:
http://www.mediatips.de/stadtplan.html

This is a great starting point for information about Berlin:
http://www.berlin.de/home/.html/index.html

Or are you after the ultimate shopping experience in Berlin?

Try this site first:
http://www.b-shops.de/

Or is it Berlin culture you are interested in?

Maybe this is your starting point:
http://kultur-netz.de/berlin.htm