Selenium 2.0 is about integrating the web driver into Selenium RC.
it is under development stage now and alpha version is available.
Advantages
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The use of web driver improves support for
* Mult-browser testing including improved functionality for browsers not
well-supported by Selenium-1.0.
* Handling multiple frames, multiple browser windows, popups, and alerts.
* Page navigation.
* Drag-and-drop.
* AJAX-based UI elements.
For more information on this check out the official Selenium Site by clicking here
