FOUR LETTERS?!? I CAN'T DEAL WITH THAT!! Heh... Apparently not all the new formats will be backwards-compatible, either. Great.

"Office 2007 will have two major changes to the office file format. For the first time Microsoft will have file extensions with more than 3 characters, but more importantly it will move from the well know .doc, .xls and .ppt file extensions for the popular Office documents."