Interfacing with a PS3 Controller

Hello everyone,
I am trying to make a, I guess you can say spy R/C car.

I believe that I have most of the things under control but I would really appreciate any help on mainly two topics.
I am running a Mac Version 10.6.8 Running snow leopard. My Arduino is the Uno.

Controlling with a PS3 controller and if there is any way to stream live video, so I can see what it sees.

Any help will be very much appreciated, even if you can just point me in the right direction.

Thanks!
XD XD