The answer is yes! Definetely! Microsoft UK made a post:
The Product Group have released an newer version of Visual Studio, but they aren't releasing it as a CTP. It is aimed at fixing a couple of problems for some targeted customers. The reality of this isn't tested or up to the quality of a proper CTP. You can still use this download, but it has some problems and it isn't supported for TFS. I would recommend waiting until Beta 2. Sorry for any confusion I have caused.
You can download VPC image from http://download.microsoft.com/download/f/2/a/f2ac411f-acf9-42a7-a84f-3efc409bcd6b/VSTS_VPCJuneCTP.mht
Breaking Changes in .NET Fx Libraries (Update: 7/11/2007)
LINQ to SQL: INotifyPropertyChanged and Column properties have changed, which generates 100+ errors in small projects. You'll need to recreate your LINQ to SQL classes with the renamed LINQ to SQL Classes template.
LINQ to SQL: Jim Wooley reports in a comment that the System.Data.Linq.AttributeMappingSource and System.Data.Linq.XmlMappingSource classes have moved to System.Data.Linq.Mapping.AttributeMappingSource and System.Data.Linq.Mapping.XmlMappingSource respectively. [Note: MappingSource changed to AttributeMappingSource and XmlMapping changed to XmlMappingSource, and namespace prefixes added.]
LINQ to DataSet: The System.Data.DataTableExtensions namespace has moved from System.Data.Entities.dll to System.Data.DataSetExtensions.dll so you must change references.
LINQ to XML: Fixing "Could not load type 'System.Linq.Func`2' from assembly 'System.Core, Version=22.214.171.124, Culture=neutral, PublicKeyToken=b77a5c561934e089'." exceptions requires adding a reference to System.Linq.DataSetExtensions.dll. This is probably a temporary expedient for the June 2007 CTP.
(via OakLeaf Systems )