Here is the latest in my link-listing series. Also check out my ASP.NET Tips, Tricks and Tutorials page and Silverlight Tutorials page for links to popular articles I've done myself in the past.
Building a Great ASP.NET AJAX Application from Scratch: Brad Abrams has a nice end to end application tutorial that shows off building an ASP.NET AJAX application from scratch. It covers ASP.NET, LINQ, Server and Client-side AJAX, the ASP.NET AJAX Control Toolkit, jQuery and more. A great end to end read.
Silverlight and WPF
XAML Power Toys Released for WPF and Silverlight: Karl Shifflett has released an awesome update to his XAML Power Toys download. This is a must-have download if you are doing WPF or Silverlight development, and provides a bunch of great wizards and tools that help automating application development. Very, very cool stuff.
Hope this helps,