Welcome to vSphere-land!

vStorage Thin Provisioning Datasheet (VMware)
Performance Study of VMware vStorage Thin Provisioning (VMware)
vSphere 4 0 Thin Provisioning on EMC Storage (video) (EMC)
Thin on Thin? Where should you do Thin Provisioning – vSphere 4.0 or Array-Level? (Virtual Geek)
Pointers for using thin-provisioned disks (Virtualization Pro)
VMware Thin Provisioning within ESX 4.0 (Xtravirt)
Why Thin Provisioning Is Not The Holy Grail for Utilisation (The Storage Architect)
Reclaiming unused VMDK space with storage thin provisioning (SearchVMware)
Provision a Thin Provisioned Standby LUN For vSphere Thin Provisioning (VM/ETC)
VCE-101 Thin Provisioning Part 1 - The Basics (Virtual Storage Guy)
VCE-101 Thin Provisioning Part 2 - Going Beyond (Virtual Storage Guy)
Get Thin Provisioning working for you in vSphere (Virtual Insanity)
Living Thin in a Fat World (IT Blood Pressure)
Responsible Thin Provisioning in VMware vSphere (vCritical)
Storage VMotion and moving to a Thin Provisioned disk (Yellow Bricks)
VMware vSphere 4 Thin Provisioning: Pros & Cons (The Lone Sysadmin)