You can find out more about Dooyeweerd on the website All of Life Redeemed found at
http://www.freewebs.com/reformationalphilosophy/
He is a NeoCalvinist in the tradition of Abraham Kuyper.
At my the Christian school I used to teach at we used his philosophy of aspects to create integral units. I wanted to know more about him. I looked up the information on All of Life Redeemed which has a bio and some of his works.
I then read Ronald Nash's
Dooyeweerd and the Amsterdam Philosophy. Nash explains Dooyeweerd's philosophy and some of the concerns about him.
Also you can find good information about Dooyeweerd and his aspects at
The Dooyeweerd Pages
Hope this helps.