Today we released Dynamic Data Preview 4 on Codeplex. Here is the link: http://aspnet.codeplex.com/Release/ProjectReleases.aspx?ReleaseId=27026. This preview releases showcases many of the new features we are adding to Dynamic Data in the upcoming .NET 4 plus some samples of using .NET RIA Services and ADO.NET Data Services. Here is a list of all the new features in the preview release:

• Entity Templates
• Filters
• Support for inheritance in Entity Framework and Linq to SQL
• Support for many to many in Entity Framework
• Email and Url field templates
• Support for many new data annotation attributes
• Display
• Order – control order of fields
• AutoGenerateFilter - control if a field is used as a filter
• FilterUIHint – override default filter used for a field
• Ability to provide default values for fields at runtime
• Ability to use field templates and validation in Web pages hosted by any ASP.NET application.
• Requires no data model
• Requires no routing
• Datasource for accessing .NET RIA Domain Service and Dynamic Data support for .NET RIA Domain Service
• Datasource for accessing ADO.NET Data Services and Dynamic Data support for ADO.NET Data Service

More details can be found by checking out the README.doc on the download page or in the DynamicDataPreview4.zip.