The entertainment check-in app GetGlue just hit a major milestone.  Since its release on the iPhone in June 2010, the app has seen solid growth, now totaling over 1 million users.  GetGlue allows users to check-in to activities, the way that many apps let you check-in to locations.

The app allows users to share what they are currently watching, reading or playing with their friends over Facebook and Twitter.  The service recently added full foursquare integration to go along with new check-ins for sports, so that users can also broadcast the location of their activities.

GetGlue also announced they have reached another milestone, 100 million data points.  These data points refer to the system of rating and recommendations that is built into GetGlue.

“These data points represent connections between people and the entertainment they’ve consumed, revealing insights about tastes and dynamics of entertainment consumption. With this milestone GetGlue now joins established internet properties like IMDB, Fandango, TV Guide, Yahoo!, and Amazon as a significant source of entertainment tastes.”

To the people at GetGlue, these milestones must signal their arrival as a legitimate entity within the social entertainment sphere.  The big question, obviously, to a service that is growing, is where is the money going to come from?  In an interview with Forbes, CEO Alex Iskold had this to say:

We are currently experimenting with a number of different ways to monetize the service. We’ve done a few implementations with sponsored rewards, and increasingly see this as an interesting option.

However, longer term, we see the aggregate data set as the valuable asset. Already, from the 100M data points, we’re able to get rich insights into consumption patterns and behavior around entertainment.

Consider the current state of entertainment analytics: a tiny amount of sampled data impacts how 100’s of millions of dollars are spent by entertainment companies and brands. There’s a very real, very large opportunity here if you can provide meaningful insights at scale.

Some statistics about GetGlue :

• Averaging over 1 check-in per second with 10 check-ins per second during primetime
• Averaging 1 share per second to Facebook and Twitter
• In primetime, up to 20% of tweets about shows are coming from GetGlue
• For instance, 10% of tweets about the season finale of Californication came via GetGlue

Do you use GetGlue?  How often do you check-in to it or any other service that involves check-ins?  Yesterday, Goby CEO Mark Watkins wrote an article titled “2011: The Year the Check-in Died.” In it, he predicted the decline of check-in services that don’t offer much more than check-ins.  Is a service like GetGlue immune to that decline because of its recommendations, rankings, and the ability unlock stickers and such?  How about Foursquare or Google, who are both attempting to bring deals and rewards programs to people who check-in?

Let us know how you feel about check-ins, and check-out GetGlue’s infographic from their blog: