It's here!  Visual Studio 2008 is now available to download for MSDN subscribers.  Lots of great stuff is available in Visual Studio 2008 and .NET 3.5 such as:

• Language Integrated Query (LINQ)
• LINQ to SQL Designer
• New ASP.NET 3.5 controls such as the ListView and DataPager
• Nested Master Page designer support
• Split View design mode for ASP.NET and WPF
• Integrated ASP.NET AJAX support
• ASP.NET AJAX control templates
• JavaScript Intellisense
• WPF designer
• Workflow designer
• WCF integration and support (even with ASP.NET AJAX)
• Integrated Office 2007 development templates
• Vista UAC manifest file support
• Unit testing support now also available in the professional edition (and team editions)
• Much more....