I have gotten the same email from several people and the fix has been the same just about every time so I thought I would publish the conversation here. Hopefully some searching of the web will help save a couple of email stamps. ;) Mr. Pugglesworth:...
So you tried to run MOSS 2007 beta 2 install and do an upgrade but you got an error. The error said something like: Failed to initialize SharePoint Products and Technologies upgrade. An exception of type Microsoft.SharePoint.PostSetupConfiguration.PostSetupConfigurationTaskException...