I was having a huge amount of trouble with poly~ object until they made this video. I found poly~ to particularly troublesome in Max. I kept seeming to make a bumble somewhere along the line. This video now makes it pretty idiot proof which is especially good for me :) It's a great video because it shows a lot of the problems I was coming across and explains really simply why it was happening. Max is a visual programming language so it is great to have visual learning resources. With the Cycling 74 tutorials, Baz Tutorials, Peter Batchelor, and the Delicious tutorials there are now some great Max/Msp resources out there.