• keep base image as small as possible
• lock down guest OS so end-users cannot write data outside of network shares
• replicas stored on fast disks (SSDs or 15K), linked clones on slower disks
• windows 7 image, 1 vCPU, 1GB RAM (2GB for power users)
• suggested max desktops in a pool = 400 (verify)
• per vmware max linked clones per VMFS volume = 60-90 (the closer to 60 the better)
• anti-virus engines scheduled scans set to random (or off), possible real-time protection off
• use vshield for virus scanning instead of desktop AV if possible

numbers:
according to an equallogic document, 78 virtual desktops ran optimally on a 2-quad core server w/ 96GB of RAM

example VDI servers from racktop “vbox” solutions –  http://www.racktopsystems.com/products/vbox/models

vmware roi/tco calculator – http://roitco.vmware.com

additional notes:
quickprep does not generate a unique SID, but it’s considerably faster than sysprep. sysprep can also still be used if desired.
SID is kept on refresh, but lost on recompose/rebalance

documents:
storage considerations for vmware view
sizing and best practices for deploying virtual desktops with dell equallogic…
sizing and best practices for deploying vmware view 4.5 on vmware vsphere 4.1 with dell equallogic storage
vmware view optimization guide for windows 7
dell dvs enterprise 6020 (vmware view)