WorkCycles Dealers

The Netherlands
Bakfietsservice Culemborg
Beer Transportfietsen Den Haag
Bob Orange Bicycles Amsterdam
Fietsje Groningen
Gooiker Step Trading Hengelo (Kick scooters only)
John Theissen Tweewielers Lichtenvoorde
Nijland Fietsen Heeten
Stuurwold Tweewielers Groningen 

Europe
Bikefix London, England
Cenas a Pedal Lisbon, Portugal
Double Dutch Frauenfeld, Switzerland
Fahrradladen Mehringhof Berlin, Germany
Iki Fillari Helsinki, Finland
On Your Trike Newcastle, England (Espresso trikes only)
Really Useful Bikes Bristol, England
Velo Company München, Germany
Zweitrad Berlin, Germany

USA
AdelineAdeline Manhattan, NY
Clever Cycles Portland, OR
Dutch Bike Chicago Chicago, IL
Dutch Bike Seattle Seattle, WA
My Dutch Bike San Francisco, CA
Varsity Bike & Transit Minneapolis, MN
Wheelhouse Santa Barbara, CA

Canada
Curbside Cycle Toronto, ON
Rain City Bikes Vancouver, BC
Fourth Floor Distribution Toronto, ON (Canadian import & distribution)

Asia/Pacific
FT Trading Nagano, Japan

Interesting links
Bakfiets-en-meer Blog Henry's Amsterdam-centric blog: news, stories and humor about transport bikes, city bikes, bicycle art, culture..
Conference Bike Eric Staller's 7 person bicycle.

Amsterdam visitor info
Amsterdam Info Another nice English language guide to the city.
Feniks Charter Holiday boat travels through the Dutch countryside.
Simply Amsterdam Handy English language visitor's guide.