Here we go:

 1.

ASP.NET Configuration

http://www.codeproject.com/KB/aspnet/websitecofig.aspx

2.

Converting .NET assemblies  to Silverlight assemblies - quite usefull.  Just modify IL to use Silverlight.dll and Silverlight cut down version of mscorlib.dll and you are good to go.  See details in the article below

3. Calling Web Service from AJAX page, MIcrosoft made it very easy and now you can use JASON instead of SOAP:

 http://aspnet.4guysfromrolla.com/articles/011409-1.aspx

Tip of Today:  In order to enable JavaScript intelisence in VS 2008, just drug and drop javascript file on the asp.net page.