How to Get There
Plane
Paderborn Airport is well connected to Munich Airport (daily flights by LH).
Check http://www.airport-pad.com/index.php?__lang=en&catalog=/fluege/sommerflugplan_2014 for best connections to US and other destinations via Munich or direct holiday flights.
Paderborn is also close to several other major airports: Düsseldorf, Hannover, Frankfurt/Main (continue to Paderborn by train).
Train
You can reach Paderborn by train via Kassel, Dortmund or Bielefeld (ICE Stations).
Check http://www.bahn.de/i/view/DEU/en/index.shtml for connections and online ticketing.
Car
Paderborn is connected to the German highway system (A33). But a car is only necessary for exploring the region around Paderborn (for the conference public transportation is sufficient).
Visa
You can find visa information at the webpage of the German Foreign Ministery at
http://www.auswaertiges-amt.de/sid_157B02E1FEC3081E2A553193E4C8AE2E/EN/Startseite_node.html