Welcome to vSphere-land!

What’s New with VMware vSphere 4 (VMware)
What’s New with vSphere 4.0 (VMware)
What’s New in vSphere 4.0: Technical Overview (Technodrone)
Creating a VMware vSphere guest OS: What’s new (SearchVMware)
A Tour of VMware vSphere (SearchVmware)
VMware focuses on stability, availability and security with vSphere 4 (SearchVMware)
A random collection of whats new vSphere eye candy (Boche.net)
vSphere Memory/CPU Hotplug (hot add) (Boche.net)
vSphere Is Coming (Virtualization Pro)
New vCenter Server features in vSphere (Virtualization Pro)
Enhanced alarm reporting in VMware vCenter Server 4.0 (Virtualization Pro)
HA enhancements, exploring the next version of ESX/vCenter (Yellow Bricks)
vSphere Launch Video (RTFM Education)
Video: vSphere4 Unleashed: 05 - Hot-Add and Thin-Provisioning (HyperVizor)