Please add through comment any SQL-related webcasts you find on the internet. I will cleanup the list every month.
24 Hours of PASS: Celebrating SQL Server 2008 R2 – May 19, 2010
Creating Data-Driven Subscriptions in SQL Server Reporting Services – April 13, 2010
PASS AppDev VC Presents – PowerShell for Database Developers – April 13, 2010
Using SQL Server 2008 Database Mirroring to Become a Super Hero! – April 14, 2010
PASS AppDev VC Presents – Understanding SARGability (to make your queries run faster) – April 27, 2010
Microsoft Video Training – Development Tracks
Microsoft Desktop Player – Aggregated Video Tutorials for IT Pros & Developers