In a MadLibs-style web form with simple multiple-choice drop-down menus, the DIY Yahoo Resignation Letter makes it so much easier to let your managers know that you've decided to blow the Sunnyvale popsicle stand. Not sure who's currently in charge? You can simply address your greeting to "whomever is running things today (sorry, the org chart Wiki is changing too fast for me to keep up)." You can thank freelance writer and Wired contributing editor Mathew Honan for the handy tool.