October 2004 seems to become the most interesting month for all available and expected XML-based rich client technologies:

Kudos to Artur for this in flex-discussion...

Xamlon provides Xamlon Professional 1.0 now, a tool which supprts Microsofts XAML already now to build Windows applications. I didn't dig into it further up to now, but they promise to offer updates to the tool with the specification of XAML changes ;) - and I'm sure this will become necessary, hey - it's Microsoft ;)

More about Xamlon here...