If you are developing real world ASP.NET applications then security is something that you should be concerned about. How do you make your site or application is tamper proof but still make it flexible enough from an end user point of view ?
In order to make your web application more secure then [...]

Google Reader now supports embedded video from YouTube, Google video and many other sites (MySpace, Jumpcut, Grouper, IFILM, Metacafe, Revver, Vimeo, vSocial, and games from Monsters and Critics).
Official Google Reader Blog: Getting embedded in Google Reader.
This feature further enhances the excellent product that is Google Reader. I use it for all my RSS consumption. [...]

ASP.NET AJAX 1.0 (formerly known as Atlas) has been officially released.
ASP.NET AJAX 1.0 delivers a rich client-side AJAX library that provides cross platform, cross browser support for a core JavaScript type-system, JSON-based network serialization stack, JavaScript component/control model, as well as common client JavaScript helper classes. ASP.NET AJAX also delivers a rich server-side library [...]