It looks as though Microsoft are sprinkling some magic fairy dust over their upcoming office suite software, Office 2013. The latest suite will sport new icons to represent each particular program, as well as including the ability of built-in PDF editing.
Two icons for Office 2013 has popped up on liveside.net, and should be a window (geddit?) into the new icon styling in Office 2013. As you can see from the above picture, the Excel icon has an "X" on it, and the OneNote has a "N" on it, which should show us that we should expect the letter to correspond to the program, which means Publisher should have a "P" on it, Outlook with an "O", etc.
Next up is the built-in PDF editing, MS Office 2013 has it all built-in, and all that you need to do before editing a PDF is locating the file, opening it, and that's it. The public beta release of MS Office 2013 is expected in the coming weeks, and we'll post about it when it hits.