From the bitly Blog:
Have you ever wanted to know more about the life of the links you save on bitly? For example, are you the first person to save this link? Was the link popular in the past? Is anyone else clicking this link right now?
You can now learn more about the “life” of any link you save, with key insights about the link that are displayed the second you save it. Key insights include being the first to save a link, or saving a link that was popular today or in the past.
You can also see the historical click data for links that were very popular in the past. Maybe a link you just discovered saw hundreds of clicks two months ago. Take this opportunity to bring the link back to life and share it once again.
Read the Complete Announcement
See Also: If You Like Link Insights, Take a Look at Realtime, from bitly Labs
Keyword search of links saved using bitly across all major social media services. In other words, real-time news and social media search.