Great vSphere 4 best Practice Guides:

http://vmetc.com/2009/05/24/vsphere-40-best-practices/

• Installing ESX 4.0 and vCenter 4.0 best practices
• Upgrading to ESX 4.0 and vCenter 4.0 best practices
• vCenter Server Installation Worksheet
• Upgrading an ESX 3.x virtual machine to ESX 4.0

Great vSphere information Links:

http://vsphere-land.com/news/vsphere-the-missing-links-every-vsphere-link-you-need-to-get-started.html
http://vsphere-land.com/news/some-must-read-vsphere-kb-articles.html
http://www.yellow-bricks.com/2009/04/21/vsphere-linkage/
http://vmware.com/products/vsphere/upgrade-center/licensing.html
http://communities.vmware.com/community/vmtn/vsphere

vSphere is again the next revolutionary step in virtualization again led by VMware. Get involved now and learn more!

Windows 7 RC Fix for Running on ESX 3.5:

If your trying to make this available on the current ESX 3.5 update 3 or older you may find the sysprep function will crash (c:\windows\system32\sysprep).

I opened a thread on VMTN and a solution is to stop or disable the "Windows Media player Network Sharing Service".

Set the OS for the virtual machine to Vista for now.