Geert Wilders has an active website, with many articles and posts in English. Here is the link.
His speech "The Failure of Multiculturalism and How to Turn the Tide" which he presented at the Magna Carta Foundation in Rome on March 25 is reprinted on his site, and discussed at Gates of Vienna. I have also referenced it in my blog post "Modern Day Barbarians."
His refreshing optimism (or should I say, his lack of cynicism) is apparent in his interview with Radio Netherlands Worldwide where he discusses the "unstoppable ‘anti-Islam’ wave." A brief summary in English is posted at Radio Netherlands Worldwide's website, and part of the interview is reprinted in English at the blog Islam in Europe.