Sidefx is including it's new, redesigned, ass kicking dynamic module called DOPs in HOUDINI 8.
It basically does rigid body dynamic, cloth simulation, and a lot more than that.
And we can download a new tutorial from sidefx's web site and it pretty much explain everything that you will need to get start on DOPs.
http://sidefx.com/index.php?option=com_ ... Itemid=132