The Wikipedia Usability Initiative : http://usability.wikimedia.org/wiki/Main_Page has come up with a new redesign for Wikipedia , Currently wikipedia users can try out The New Beta Design by loging into a free account

There have been changes in the navigation system . This can be check out in their Prototype sites .

Wikipedia –

Enhanced navigation

The new navigation system makes it easier to see where you are and what you are doing, as well as where you can go and how to get there. With the search box located in the top right corner, the search feature is easier to find and quicker to use.

Edit toolbar improvements

New-and-improved icons make it clearer what action each tool performs. Expandable sections reduce clutter while keeping infrequently used tools just a click away. The help section provides quick access to a reference for common uses of wiki-markup.