Are you on 4.1 yet? If so, it just got better. If not, now is the time.
VMware is pleased to announce that VMware vSphere 4.1 Update 1 is generally available as of February 10, 2011.
This release provides the following improvements:
VMware vSphere Core Platform (ESX/ESXi)
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* Support for up to 160 logical processors
* Inclusion of additional drivers
* Enablement of Intel Trusted Execution Technology (ESXi only)
* Additional guest operating system support
* Bug and security fixes
VMware vCenter
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* Additional guest operating system customization support
* Additional vCenter Server database support
* Bug and security fixes
VMware vCenter Update Manager
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* The VMware vCenter Update Manager Utility to help users reconfigure the setup of Update Manager.
* Bug and security fixes.
VMware vCenter Orchestrator
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* Bug Fixes
For details regarding the new fixes and improvements, please refer to
the following release notes:
VMware ESX
http://www.vmware.com/support/vsphere4/doc/vsp_esx41_u1_rel_notes.html
VMware ESXi
http://www.vmware.com/support/vsphere4/doc/vsp_esxi41_u1_rel_notes.html
VMware vCenter
http://www.vmware.com/support/vsphere4/doc/vsp_vc41_u1_rel_notes.html
VMware vSphere 4.1 Update 1 is available for download
http://downloads.vmware.com/d/info/datacenter_downloads/vmware_vsphere_4/4_0