If for some strange reason you read neither Chris Sells or Chris Anderson's blog and lust after new Avalon info, check out the latest CTP of Avalon. Here's a MSDN brief you'll want to read first! And Chris Anderson (aka Simplegeek) has released a new version of XamlPad and it's now called AvPad. I find it's the best way to get your hands dirty with XAML. With some nice new features like the visual tree.