Guide to Code Access Security in SharePoint Server 2007

Andrew Connell has published an article on CAS for SharPoint.
It will be very helpful for Developers. Click here to read more.

Developing on SharePoint 2010

Getting Started
Module 1: Getting Started: Building Web Parts in SharePoint 2010
Module 2: What Developers Need to Know About SharePoint 2010
Module 3: Building Blocks for Web Part Development in SharePoint 2010
Module 4: Accessing SharePoint 2010 Data and Objects with Server-Side APIs
Module 5: Accessing SharePoint 2010 Data and Objects with Client-Side APIs
Module 6: Accessing External Data with Business Connectivity Services in SharePoint 2010
Module 7: Developing Business Processes with SharePoint 2010 Workflows
Module 8: Creating Silverlight User Interfaces for SharePoint 2010 Solutions
Module 9: Sandboxed Solutions for Web Parts in SharePoint 2010
Module 10: Creating Dialog Boxes and Ribbon Controls for SharePoint 2010

SharePoint BI

A very good 6 Parts article on SharePoint's role in BI.

Part 1 – Getting to Know You – Intro to SharePoint BI

Part 2 – Sell! Sell! Sell! Why Build a Dashboard Anyway?

Part 3 – KPIs – Where do I Come From?

Part 4 – Dissecting Dashboards

[Awaited for the articles to release]

Part 5 – We Really Need to Talk – Scorecards & Reports

Part 6 – Beware the Bogeyman – Securing Dashboards

SharePoint 2010 Videos

http://channel9.msdn.com/Media/Videos/