Unlogo is a web service that eliminates logos and other corporate signage from videos. On a practical level, it takes back your personal media from the corporations and advertisers. On a technical level, it is a really cool combination of some brand new OpenCV and FFMPEG functionality. On a poetic level, it is a tool for focusing on what is important in the record of your life rather than the ubiquitous messages that advertisers want you to focus on.
Take a look at this introduction to Unlogo by the creator.