I have included below a few of the Webcast from Microsoft that are pretty recent and relevant.. I usually prefer Podcast, I end up watching the webcast and don't get is much work completed…

My favorite of these are Secure Collaboration and Exchange, SharePoint, and AR RMS integration

TechNet Webcast: How Microsoft IT Scaled Enterprise Services by Standardizing Business Processes and Integrating a Global Tools Platform (Level 300)

Original Air Date: July 14, 2009

MSDN Webcast: Knee-Jerk Reactions to Proactive Solutions: Improved SharePoint Performance (Level 300)

Original Air Date: July 10, 2009

TechNet Webcast: How Microsoft IT Designs and Creates Enterprise Publishing Portals Using Microsoft Office SharePoint Server 2007 (Level 300)

Original Air Date: July 7, 2009

TechNet Webcast: Simplified Access and Single Sign-on with Microsoft Code Name "Geneva" Overview (Level 300)

Original Air Date: June 23, 2009

TechNet Webcast: Considerations for Large-Scale SharePoint Server Deployments on SQL Server (Level 300)

Original Air Date: June 4, 2009

TechNet Webcast: SharePoint Server 2007 and Exchange Server 2007 Integration with Active Directory Rights Management Services (Level 400)

Original Air Date: May 7, 2009

TechNet Webcast: Security for Exchange and SharePoint - what's not in the box? (Level 200)

Original Air Date: May 6, 2009

TechNet Webcast: Secure Collaboration using AD RMS, MOSS and AD FS (Level 300)

Original Air Date: May 5, 2009

Have Fun!

Cheers,

-Ivan