If you are looking into virtualization or already using it, you will have likely heard that VMware is releasing their next major version of ESX server tomorrow. vSphere 4.0, the new name for Virtual Infrastructure, is a significant upgrade and has dozens of new features. Although it was formally announced last month, May 21 will be the first day you can place an order and (hopefully) download an evaluation copy.
Features such as hot-add of CPU and memory, Microsoft Server 2008 cluster support, support of the Cisco Nexus 1000v, and full support for the new Intel Nehalem processors are just a few of the enhancements. Even better, if you have a current support contract you can upgrade to the ‘like’ edition for free.
Also, remember you can install ESX server inside a VMware Workstation 6.5.2 virtual machine. You can even run VMs inside ESX, running inside of Workstation. Not great for performance, but great for testing it at home or on your (beefy) laptop. Also very useful for studying if you are trying to pass the VCP exam, like I am.