MVA - Microsoft Virtual Academy

http://www.microsoftvirtualacademy.com/GetStarted.aspx

MVA is a training portal that offers you (at present date) the following tracks:

Clustering
Hyper-V
IaaS
Office 365
PaaS
Private Cloud
Public Cloud
SaaS
Security
SQL Azure
System Center
VDI
Virtualization
VMware
Windows Azure