SOFTWARE:
Windows
- Webcam Max http://www.webcammax.com/
VH Screen Capture Driver http://www.hmelyoff.com/index.php?section=4
Virtual Audio Cables http://software.muzychenko.net/eng/vac.html

Mac - Camtwist

TRAINING:
Webcast Academy - http://www.webcastacademy.net
Wes Fryer - Webcasting on a Shoestring Budget http://handouts.wesfryer.com/shoestring-webcasting

EdTechTalk - http://www.edtechtalk.com

Tutorial on webcasting using Skype, Ustream and Macs - http://educationaltechnology.ca/couros/765
http://myfla.ws/blog/2007/10/10/audio-loopback/

Camtwist Tutorial Video - Youtube - AskMrVideo.com