recently I decided my enviroment needed dust in the air so I have been searching for a good deatailed particle tut, I have just recently seen one on Eat 3d and that was okay at best.
The UDN has really good explanations on what different modules do. If you know how to make good particle materials, learning cascade shouldn't be hard even without any tutorials.
Replies
http://www.polycount.com/forum/showthread.php?t=67752