I found some of the very useful links for ASP.NET practices at Mike's blog. However, In the comment somebody has posted quite more information. Have a look at it: http://www.mikepope.com/blog/DisplayBlog.aspx

While working in Visual Studio Designer, Following controls don’t show up on the designer, you can see the HTML for them though. These controls are called Non-Visual Controls. Some of them are: SqlDataSource AccessDataSource ObjectDataSource XMLDataSource...

Today Windows Live Service, Live.com and Live Search got beta tag off. The user interface is really cool. Its really fast. I tried searching, and I found it is useful and fast. The ability to personalize the portal is really awsome.