I don't think Microsoft Patterns & Practices wanted anyone to actually attend the Enteprise Library 4.0 Webcast as it was poorly advertised and the start time was incorrect as displayed on Microsoft Events ( July 11, 2008 1:00 am Pacific Time). But, if you want to watch a webcast on Enterprise Library 4.0, you can download the on-demand version when it is available.
Per the description on Microsoft Events-
"Microsoft Enterprise Library is a collection of reusable software components (application blocks) designed to assist software developers with common enterprise development challenges (such as logging, validation, exception handling, and many others). The design of application blocks encapsulates the Microsoft recommended and proven practices for .NET application development. This webcast will provide an overview of Enterprise Library and cover the new features of Enterprise Library 4.0, including: integration with Unity dependency injection container; improved instrumentation and WMI2 support; and pluggable cache manager. This webcast is targeted for architects and developers who are both new to Enterprise Library and those who have used it in the past."
Don't forget to check out my screencasts on Enterprise Library 4.0 and Unity Integration-
You can find numerous Enterprise Library Tutorials and Examples on my personal website:
Check out the Enterprise Library 4.0 with Visual Studio 2008 Webcast here.