Instagram Now Adding 130,000 Users Per Week

And I have to wonder how many of those users will come to regret that they shot all their babby-pictures in some deliberately cruddy format instead of the best possible available to them.

This sort of story reminds me no idea has (or can) been executed perfectly, a year ago I would have said Flickr has photo sharing sewn up...

That's impressive growth! They've carved out a niche for mobile photo sharing with their iPhone app. Now they're letting developers extend on the web via the API.<p>People usually talk about viral growth on Facebook, but Instagram has recreated it on the iPhone platform. And they haven't even released their Android version yet!

Wow, they completely exposed their data set. Don't see many companies giving away cohort retention details like this.