On this week's Code Project articles , you might find quite satisfying .NET 2008 ASP.NETweb message board application which is quite well explained.I though you may want to check it out.  http://www.codeproject.com/KB/aspnet/VS2008MessageBoard1.aspx 

One of the top features in C# 3.0 is Lambda expression. A Validation Library has been written , and published in Code Project Articles on this week.  http://www.codeproject.com/KB/cs/ValidationUsingLambdas.aspx   You may find the below link useful for starting Lambda Expression. http://www.developer.com/net/csharp/article.php/3598381  The 2nd link is useful for comparing what we were doing before , and how we can improve our coding by using Lambda Expression. The Syntax of Lambda Express is quite confusing but you will get used to it !