Load Testing Online Video Tutorial

Load Testing with the Web Performance Suite: Quick Start
http://www.youtube.com/watch?v=8ihQJkTvElQ
http://www.webperformanceinc.com/

Apache JMeter
http://www.youtube.com/watch?v=eAksSWSDCP8&feature=related&pos=0
http://www.youtube.com/watch?v=KI6u5pclYIw&NR=1