http://www.microsoft.com/click/sharepointdeveloper/
You may know about this site but I just found it and it’s got a lot of great information! It also has a very slick SilverLight interface. 🙂
The topics include an overview and samples for
- Web Parts
- Data Lists
- Event Handlers
- Workflow
- SilverLight
- Page Navigation
- Page Branding
- Web Services
- Content Types
- User Management
- AJax
Check it out!