Perhaps the top reason to use Bit.ly (beyond obviously shortening links) is for its analytics. The service makes it easy to see all sorts of data about your short URL links going out to services like Twitter. But sometimes looking at the bigger picture is more interesting than individual data. Now you can see that too.

Today, the service has unveiled its new Bit.ly Click Summary. This is a new page on the site that allows you to see aggregate data for all your Bit.ly links over a set period of time. Currently, this only works for the past 7 days, but Bit.ly says that monthly views will be added soon as well.

Along the top of this new page, you’ll see a bar graph showing your aggregate clicks over each of the last seven days. Next to that, you’ll find pie charts showing Top Referrers and Locations for your link data. Finally, below that is a huge list of referrer and country data for the set time period (again, in this case, a week).

The referrer list is particularly interesting because it gives you a good sense of which Twitter clients are most popular among the people that click on your links.

As Twitter’s default URL shortener, Bit.ly has been gathering a ton of valuable link data for quite some time now. We’re still waiting for them to launch Bit.ly Now, a service expected to take on popular link sites like Digg.