Perhaps the coolest addition to the photo-sharing app is its revamped news feed. The service has split the feed into "Following" and "You." Now you can see what those you're following are "liking" and commenting on.
Also, in addition to sharing snaps on Twitter and Facebook, etc., you can now e-mail a picture directly from the app (perfect for sending friends pics of themselves).
The update also includes a ton of smaller -- but still cool -- additions. For example, you now have the option to add the Tilt-Shift Effect. After you snap a pic, tap it to activate this feature. Basically, this effect lets you change the focus of the picture, and blur other portions accordingly. Mashable's Christina Warren -- currently chilling in my room in Austin -- took this picture of the city's skyline.
Other changes include the option to tap and hold on a person's name to mention them and the choice to add location without naming a specific spot.
While we're certainly digging these changes, we wish Instagram had added something like "Collections," which image-sharing rival Picplz introduced Thursday. Collections are basically groups of photos within the app that you can build and edit.
Still, with 2 million users and a ton of buzz (not to mention high-profile brand participation), Instagram is undoubtedly the favorite of the photo-sharing apps at present.