The Dutch Wikimedia chapter issued today a press release seeking quality pictures of famous people. In the press release it is explained that for the Wikimedia projects we need pictures available to us under a free license.
To make things easy, a special website, wikiportret.nl provides a helping hand when making a picture available to the WMF projects. There is a press kit available on the website.. I expect that the famous people in the Netherlands and Belgium will appreciate that a quality picture in Wikipedia is great publicity.