The Brandenburgisch reference article from the English Wikipedia on 24-Jul-2004
(provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Brandenburgisch

Sponsor with the world's largest charity for orphans
Brandenburgisch is a dialect spoken in Germany in the area around Berlin.

It is sometimes classified as an East Low German dialect, but it merged very much with the East Middle German dialectss (like Standard German) and Slavic languages, so that it has in fact no connections any more to the other Low German dialects.