It seems to be the new kid on the relgious block or i think,what's it all about and where did it come from?
You might go to their web site. My understanding is that it was started by a guy named L. Ron Hubbard who was a writer of fiction. It is popular among the rich and famous in Hollywood where trying the new thing is in vogue. I would consider it a cult based on the personality and teachings of an individual.
The whole point is that people fail to understand why science and religion can correlate. But actually I think its off topic now.
In my opinion Hubbard was a good Sci-fi writer and he should have stuck with what he knew. To my understanding Scientology is essentialy agnosticism, but only allows for certain agnostic beliefs.