Probably the best site to start looking on Dutch art,

and continue looking.

Galeries.nl is definitely a very complete site on museums, galleries, artists, art fairs, art blogs and many related topics. A favorite place is the art of the day with a critical and sometimes personal accompanying text. It is a very logic site, and that says a lot having the amount of various information they manage. They have about 35000 artists you can search on, many of them international artists. Another thing I like is that it is run in a very personal way by the caring webmaster Benno Tutein Nolthenius.
Only one problem it is only in Dutch!

Here Esther Tielemans as example.
Just in case you didn't know it the site.