Facebook has just started rolling out a new homepage design to a small number of users, and will be deploying it on a wide scale in the near future. The design takes the navigational elements that have previously been tucked under the “Applications” menu and returns them to the left sidebar of the page (which is actually where they were a long time ago). The design also includes some UI enhancements, like the ability to send messages direct from your homepage using a pop-over window, rather than having to visit a separate page.

The rest is here:
Facebook Begins Rolling Out Latest Redesign (Pics)