I have just run into this site and I would like to share these links with you.
This site provides free tutorials and really cool stuff like the Transformer they created.
Transformers triple changer Blitzwing - FREE tutorial
Create your own TRON light cycle - FREE tutorial
I also found this earth project that will be useful for my solar system scene.
Free earth model
[Blockierte Grafik: http://www.cinema4dtutorial.net/wp-content/uploads/2011/03/EARTH.jpg]