Peter Blum breaks out version 3
Almost anyone who uses my web application notices the slick client side validation as well as other various goodies. Most of this stuff comes from an excellent set of validation and input control developeed by Peter Blum.
Peter's controls are a textbook example of the excellence that can be produced by one focused individual with a specifc goal. These are bar none the best controls I have ever purchased for any purpose.
I wrote some details about my early experience with this controls here.
With version 3 Peter has rolled a lot of his packages under one umbrella including his Visual Input Security product.
Check out his stuff, there are upgrade specials right now and even at full price you will find no better value for your money.
...And version 3 will be compatible with ASP.NET 2.0