Ajax is a buzz word at the moment, despite the fact that the technologies it comprises of are quite old and well established. Regardless of how you think about Ajax and the hype around it (and Web2.0), there is one simple case where every web-developer should consider the usage of Ajax: input form validation. And DWR makes semi-clientside/serverside validation of forms a pure fun to code. While the data is still submitted to the server for validation (allowing you to fully utilize existing validation code of your Java web-application) from the user’s point-of-view the server-round-trip is spared, improving usability and user-experience.
Anyone knows if this library has been ported to .NET? 😉