Buying a popular mobile app for $210 million isn’t cool.  Know what is cool?  Buying one for $1 billion.  Such is the story today as we learn that Facebook has opened up their wallet and plucked a cool billion (cash and shares) out to purchase Instagram.  Speaking from Facebook’s official blog today, we’re advised that the deal should hit regulatory approval later this quarter and will be more than just a simple Facebook integration.

Based on what CEO Mark Zuckerberg tells us this afternoon, they plan to continue offering users the choices to share (or not) with other social networks as well as pulling from Instagram’s experiences to incorporate into other Facebook services.

For years, we’ve focused on building the best experience for sharing photos with your friends and family. Now, we’ll be able to work even more closely with the Instagram team to also offer the best experiences for sharing beautiful mobile photos with people based on your interests.

We believe these are different experiences that complement each other. But in order to do this well, we need to be mindful about keeping and building on Instagram’s strengths and features rather than just trying to integrate everything into Facebook.

That’s why we’re committed to building and growing Instagram independently. Millions of people around the world love the Instagram app and the brand associated with it, and our goal is to help spread this app and brand to even more people.

We think the fact that Instagram is connected to other services beyond Facebook is an important part of the experience. We plan on keeping features like the ability to post to other social networks, the ability to not share your Instagrams on Facebook if you want, and the ability to have followers and follow people separately from your friends on Facebook.

These and many other features are important parts of the Instagram experience and we understand that. We will try to learn from Instagram’s experience to build similar features into our other products. At the same time, we will try to help Instagram continue to grow by using Facebook’s strong engineering team and infrastructure.

This is an important milestone for Facebook because it’s the first time we’ve ever acquired a product and company with so many users. We don’t plan on doing many more of these, if any at all. But providing the best photo sharing experience is one reason why so many people love Facebook and we knew it would be worth bringing these two companies together.