Oh yes, if you wanna try yourself you need a good computer(mine probaply isnt) and a program like Webcammax to record screen and Flash live encoder 3 to put it on ustream.
Edit: Huh.. apearently you dont need live encoder to get it onto ustream. I was told i need it. Aslo I am live now amd playing a fun little game called Rubber Ninjas :P 3D ragdoll fighter game.