Orcas is finally RTM. Some things are not RTM yet such as  Expression Blend, Silverlight tooling for Visual Studio, ADO.NET Entity Framework and ADO.NET Entity Framework Tooling.

However getting back to Visual Studio MSDN Professional and Premium Subscribers can download Visual Studio 2008 from MSDN Subscriber Downloads.

Don't have an MSDN subscription? Then try Visual Studio 2008 Trial Downloads or you can download the free Visual Studio 2008 Express Editions and Microsoft .NET Framework 3.5.

Need to learn: Then use the Visual Studio 2008 and .NET Framework 3.5 Training Kit.Created originally for the ISVs, the training KIT includes presentations, hands-on labs, and demos. This content is designed to help you learn how to utilize the Visual Studio 2008 features and a variety of framework technologies including: LINQ, C# 3.0, Visual Basic 9, WCF, WF, WPF, ASP.NET AJAX, VSTO, CardSpace, SilverLight, Mobile and Application Lifecycle Management.

Add to that the Break Through Your Software Development Challenges with Microsoft Visual Studio 2008 White Paper the .NET Framework 3.5 Common Namespaces and Types Poster and the WCF, WF and .NET 3.5 Whitepapers by David Chappell.

Complete .NET Framework 3.5 Poster:

The Data, XML and LINQ section at the original resolution: