I just noted that VMware vSphere PowerCLI 4.1 is available for download since today. Go get it all and start using the new features.
Regards, Robert
Hal Rottenberg already made a blogpost about the PowerCLI 4.1 new features: PowerCLI 4.1 Released.
The VMware VIX version installed with PowerCLI 4.1 is VMware VIX version 1.10.0.12331. So the problems with PowerCLI requiring an old VIX version are gone.
See my PowerCLI 4.1 brings the New-VIProperty cmdlet post for a quick overview of the New-VIProperty cmdlet.
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Blog: lucd.info Twitter: @LucD22 Co-author PowerCLI Reference