The workshop will take place at the
Radisson BLU, Karl-Liebknecht-Strasse 3, Berlin Mitte. The hotel is located very close to the S-Bahn station "Hackescher Markt" in Berlin. Germany is well covered by google maps and maporama.
Tourist information (in English) is available at the official Berlin Tourism site.
Berlin has two airports - Tegel (TXL) and Schönefeld (SXF). Both are served from big cities within Europe. There are several low cost airlines flying to Berlin. For an overview check out WhichBudget and flylc.
Train travel in Germany and in particular to Berlin is very good. To reach Berlin by train you can find connections and order tickets online at Deutsche Bahn. Berlin Main station is a new train station between the former "main stations" Ostbahnhof and Bahnhof Zoo; Hackescher Markt is a few stops away from the main station.
The conference venue is very close to the S-Bahn (local train) station
Hackescher Markt and the S-Bahn and U-Bahn (subway) station Alexander
Hackescher Markt is served by lines S5, S7, S9, and S75.
Alexander Platz is served by S-Bahn lines S5, S7, S9, and S75 and by U-Bahn lines U2, U5, and U8. For more details on public transport see the next section.
From the Tegel airport you have a direct bus connection with bus TXL; you should get off at stop "Marienkirche".
For more directions, check out the location page of the Radission homepage.
Berlin has a very good system of public transportation. The local
transportation company is BVG. They offer a
variety of tickets
including (multi-)day and week passes. Watch out, SFX is in the
C-ticket range, i.e. to reach Berlin center you have to purchase an
ABC ticket; for your daily travel (if any) a ticket for the inner city
A will suffice.
Taking a car to Berlin is not recommended. First of all, parking is hard to find and expensive. Since 2008 the inner center of Berlin is a "Umweltzone" and you need to possess a sticker to enter (otherwise you risk fines). A brochure about this is available online in pdf.
There are several places offering bike rentals. Berlin has a lot of bike lanes and (local) drivers are very aware of cyclists (take this as a further reason not to visit Berlin by car).