This [graph showing the relative size of Facebook’s Photos feature](http://1000memories.com/blog/94-number-of-photos-ever-taken-digital-and-analog-in-shoebox) compared to Flickr, Instagram and other pools of photos is almost comical.
There are services that fit in between the size of Flickr and Facebook (such as Photobucket) but it is an interesting way to look at things.
