VMware vSphere related links
vSphere Upgrade Center
VMware vSphere Online Library Searchable Online Documentation for ESX 4.0 and vCenter 4.0
VMware vSphere 4 Documentation
VMware Data Recovery Documentation
Product Information
What Is New in VMware vCenter Server 4
What Is New in VMware vSphere 4: Storage
What’s New in VMware vSphere 4: Virtual Networking
What’s New in VMware vSphere 4: Performance Enhancements
VMware Data Recovery
Knowledgebase Articles
Installing ESX 4.0 and vCenter 4.0 Best Practices
Performing an offline upgrade from ESX 3.x to ESX 4.0 on a local ESX host
vNetwork Distributed Switch on ESX 4.x – Concepts Overview
Understanding VMware Fault Tolerance
Multipathing policies in ESX 4
Growing a datastore from the Service Console in ESX 4.0
