Are DSLR cameras good for streaming & how can you use one as a webcam?

While a webcam will suffice for most streaming, if you want to take a step up to higher camera quality, hooking up a DSLR camera is a great choice.
Digital Camera World on MSN

Many photographers still love their DSLR cameras, and I think I know why

Batteries, grips, and glass: The enduring appeal of the rugged DSLR's pure view of the world ...