Sure. All the newspaper articles are in dutch though, so I don't think you'll need those

Here are a few of the more relevant links in English I've collected. This is only a very small part of the research I did and the people I talked to.
Scientology's main website:
http://www.scientology.org/
Xenu.net, all about exposing scientology. Some good general info, if a bit biased at points. You'll also find some info on Xenu and such there. [it's down at the moment, unfortunately. Gets hacked twice a week by Scientology zealots, apparently

]
http://www.xenu.net
Freezone, which is sort of a hub for RONSORG. Ronsorg is made up of people who seperated from the "official" church and formed their own group. They still believe in the Tech and the teachings, but they offer a cheaper alternative. As I said, courses can cost hundreds of dollars, sometimes running in the thousands, per hour.. you'll find some indepth info on the Tech as well as operational structure and hierarchy [it's in there, but difficult to find]
http://www.freezone.de/english/
RONSORG yahoo group
http://groups.yahoo.com/group/ronsorg/
General info about Scientology and Dianetics:
http://www.exactscientology.net/