What is JQuery? “A new type of JavaScript Library” Jquery really made my UI developement Fun. If you are not familiar with JQuery, i strongly suggest you check it out. We can do more with less code using JQuery.
And then there is ASP.NET MVC to make make web development clean and TDD friendly. If you are not familiar with ASP.NET MVC you should check out Scott Gu’s Blog posts on different previews (currently Preview 4).
There are quite a few articles on how to integrate ASP.NET MVC and JQuery to make our lifes happier. A simple google search for “ASP.NET MVC with JQuery” return quite a few articles.