If you are starting out with WSS/MOSS development, as I am, you might be interested in downloading some of the following resources.
Hands on labs:
- Hands on Labs for Developing Applications on Windows SharePoint Services 3.0: this is a very nice set of 10 focused hands-on-labs
- PPTs and Demos for Introductory SharePoint Developer Modules: another, smaller, set of HOLs
- Windows SharePoint Services 3.0: Software Development Kit (SDK)
- SharePoint Server 2007 SDK: Software Development Kit