Videos on SharePoint Server

Here are link of some video's available on SharePoint:
Building Custom Solutions with Excel Services

Building High-Grade Applications Using Office SharePoint Server 2007

Business Data Catalog for Developers

Creating a Custom Page Layout with SharePoint Server 2007

Demo: Enable Excel Services and Data Connections for a SharePoint Team Site

Developing SharePoint Workflows Using Visual Studio 2005

Enterprise Search Technical Drilldown on SharePoint Server 2007

EC306—Integrating InfoPath Forms into Workflow Solutions and Business Processes

Getting Up and Running with Excel Services

Managing a Project Management Office with SharePoint Products and Technologies

Microsoft Office System Developers Conference 2006 Videos

Office SharePoint Server 2007 Business Data Catalog (Part 1 of 2): Integrating Line-of-Business Data and Applications into Your Enterprise Portal

Office Developer Screencast Virtual Tour

Rob Lefferts—Sharepoint Services and Workflow

SharePoint Server 2007 Presentations: Enterprise Search Deep Dives

SharePoint Server 2007 Web Content Management for Content Owners and Authors

SharePoint Server 2007 Web Content Management for Developers and Designers

SharePoint Server 2007 Web Content Management for Site Administrators and Owners

SharePoint Workflow Development and Modifications

Using Grid Computing to Scale Excel Services

Microsoft Office SharePoint Server: Learning SharePoint Step by Step

A good set of resources to learn SharePoint:

Microsoft Office SharePoint Server: Learning SharePoint Step by Step

SharePoint Designer Training

Get SharePoint Desiger training on your desktop and learn SharePoint:

Office SharePoint Designer 2007 Training Standalone Edition