Dutch isn't too bad to read anyway........
Just click on things to see what happens......
eg
De Dames = girls
Tarieven = prices (€90 per hour) + transport costs
They probably do speak English on the phone if you ask as pretty much all the people in Amsterdam do.
There's always some online translation service such as
http://babelfish.altavista.com/ that allows you to copy and paste bits of dutch etc into and it gives a rough translation in english.