I only wish Scott Guthrie (PUM for ASP / Atlas / IIS) was involved in helping to shape Avalon into something more developer friendly; I resonated completely with the first question posed to Rob Relea after his RPS305 lap around Avalon talk: "From a developer point of view it looks like a nightmare". Yes it does. And Orcas is a long, long way away.
That said, it was intereting to learn more about WPF/E.. basically a portable implementaiton of Avalon that will run cross platform. The pic taken in PRS200 shows a Mac rendering a XAML file.