Microsoft officially released Visual Studio 2008 and .NET FX 3.5! Soma in his blog announced the above releases. Soma also provided an overview of these releases at http://channel9.msdn.com/ShowPost.aspx?PostID=357748.
You can find links to these products below:
For more details about Visual Studio 2008, please read our whitepaper at: http://www.microsoft.com/downloads/details.aspx?FamilyId=17319EB4-299C-43B8-A360-A1C2BD6A421B&displaylang=en
Orcas RTM documentation generated by Sandcastle is available online at http://msdn2.microsoft.com/en-us/library/aa187917.aspx