Avalon and Indigo are no more

Microsoft has

released
a version of the

WinFX Runtime Components Beta 1
(which includes the Windows
Presentation Foundation (formerly code name “Avalon”) and the
Windows Communication Foundation (formerly code name “Indigo”)) for
the general public. The
WinFX SDK
Beta
contains the tools, documentation and sample code for
building WinFX based applications. You will also need to download
and install the WinFX Runtime Components Beta 1 prior to
installation.