The SDK for Microsoft Dynamics CRM was updated to version 4.0.6 today (September 5, 2008). This is the sixth update since the 4.0 release, a downloadable version being available here:
Microsoft Dynamics CRM 4.0.6 Software Development Kit (15.7MB)
According to the Microsoft Dynamics CRM Team Blog, these are some updates in the newest version of the CRM SDK (the entire list being available in the Release History):
- E-mail Provider documentation
- Customization file reference
- Updated Plug-in sample code
- Using CRM URLs and the PrependOrgName function
- New sample code