I really like this show, although it's too violent for me sometimes. I think I've read that it's planned to have a total of 4 seasons to complete the storyline, I guess that's Henry's story. I like how they make the characters so easy to relate to, though I'm not liking Katherine Howers so much at the moment.
Though they do mess with history a bit, at least it's not like "The other Boleyn girl", that just had me shaking my head. Wikipedia seems to have quite a detailed page on The Tudors:http://en.wikipedia.org/wiki/The_Tudors
I think I'll need to get the DVD sets once the show is complete!