This morning during the Facebook f8 keynote, Mark Zuckerberg introduced Timeline, a new way to express who you are on Facebook. It's a reverse chronological timeline of the most important pieces of content that you've shared on Facebook, which you have control over curating. Facebook apps will be able to add to your Timeline as well, and it's been built to look great on both desktops and mobile devices. Expect the feature to be rolled out sometime within the next few weeks, but you can get a peek at the goodness in the video above.