It appears that Instagram and their hefty one billion dollar price tag was one of the most valuable Facebook acquisitions over the past two years. The photo sharing network has officially topped 200 million users who have posted 20 billion photos to date.
While Facebook has taken some slack recently for their perception in the young teen market, Instagram has seen great growth in this space. More than 90% of Instagram users are under the the age of 35 and the network is rapidly growing. Of the total 200 million users 50 million of them have joined over the past 6 months.
For the official release, see the Instagram blog.