Installing And Configuring ESXI 4.1 Free edition

http://www.youtube.com/watch?v=8Uh1mBsVGYo&feature=related

The movie clip shows you how to:
1. Install VMWare ESXi Free on VMWare Workstation
2. Install vSphere Client to manage/configure ESXi

A good introduction to the VMWare vSphere Hypervisor (type 1 and 2)
http://www.youtube.com/watch?v=HtNJD5cDpL8&feature=related

http://www.youtube.com/watch?v=ZBl1Tf2A4lA&feature=related

How to install new virtual machine (VM) to ESXi

http://www.youtube.com/watch?v=2wiUW2LY-Ws&feature=related

FAQ

http://www.vmware.com/products/vsphere-hypervisor/faq.html