Digital nostalgia: Do tweets age like fine wine?

Sign up for Timehop and connect your Twitter, Foursquare, Facebook, and Instagram account and every morning a piece of your social media history will land in your inbox showing what you tweeted a year ago on that date, the pictures you posted, and the places you were. Timehop was a spinoff of 4SquareAnd7YearsAgo, which was originally built out of a Foursquare hackathon in February of last year. That service simply sent you reminders of your Foursquare check-ins in the past.