I was trying to catch up on what Silverlight is all about the other night and spent some time seeing what's out there in the way of information, demos etc. Here is a quick roundup of what I found

Useful downloads:

Silverlight 1.1 Alpha (you'll need to install this if you want to view most of the demos)
Silverlight reflector add-in (very cool way of examining what is going on, excellent learning tool)
Microsoft Silverlight Tools Alpha for Visual Studio codename “Orcas” Beta 1 (good add-on for Orcas if you plan to code)

Demos:

SilverLife
Chess
Comix
Contact information
Silverlight sample gallery
Silverlight 3D Demo (not working for me)
Silverlight Airlines
Reflecting graph demo (looks interesting but not working for me)
Yet another Silverlight XAML Demo
Video puzzle

Reading and reference: