Now a days MP6 is common discussion topic among WordPress users, bloggers and developers. Actually MP6 is a secret WordPress plugin where MP6 doesn’t stand for anything ;-) It a plugin by Matt Mullenweg, Andy Peatling and 13 other developer that transforms your admin area interface to the one that may be reshaped in near future.
There are many stories on web about this plugin, simply Google its name with plugin or WordPress sufix or refer to WP-Daily, WPMU. If you want to give this plugin a try then simply install and activate it and you are done. In simple words you can use this plugin to preview the future admin area interface of WordPress.