Fellow Reason and Renoise user Ned Rush, who I "met" over on the Renoise forums, has been posting a number of really clever Reason videos on YouTube. There's some interesting stuff to be found in his conversational style videos, so if you enjoy watching tutorials on YouTube, definitely take a look at what he has up.
Ned's videos are great proof of how flexible Reason really is and really show how far a little creativity can go in this "closed" piece of software.