The Microsoft Dynamics CRM SDK Version 5.0.3 is now live on MSDN downloads and MSDN library.

This update includes the following:

• Updated assemblies to match Update Rollup 1. For
  Microsoft Dynamics CRM Online, updates are installed for you. For other
  deployment types, you can get Update Rollups from the Microsoft Download Center or from Microsoft Update.
• Updated
  Microsoft.Xrm.Client and Microsoft.Xrm.Portal assemblies for bug fixes.
• Updated Hands-on-Labs – these now work with the RTM product.
• Microsoft Visual Studio extensions and Microsoft Dynamics CRM Solution files to support JScript IntelliSense and limited testing of JScript Libraries that use the Xrm.Page object within Microsoft Dynamics CRM forms.
• Added sample code for generating logical entity relationship diagrams. In
  addition, you can download a complete set of entity relationship
  diagrams.

Enjoy,

Steven