I have complied a list of resources that are for the System Center portion of the Live Events I am delivering.
Slides for Live Sessions
System Center Home Page
Download System Center Trial and Beta software
Technet System Center TechCenter
Archived Systems Management webcasts
System Center is a great product for monitoring your servers and applications across your network. But none of it works without Management Packs. Check out the Management Pack Catalog online where you can locate and download MP's for Microsoft and 3rd party products.
I am also doing a Technet Radio Interview today with Edwin Yuen, a Product Manager for Virtual Machine Manager. I will post a link to the final interview as soon as it is posted to the Technet radio site.
UPDATE -- I forgot an awesome link to the Technet Virtual labs for Systems Management!