Imgur: 1.2b daily image views, 3 million daily active users, 2 billion pageviews per month.
Adam Rifkin stashed this in Imgur!
Imgur recently rolled out many new features.
Imgur.com was launched in February 2009 and is hosted on Amazon Web Services.
Monetization: Imgur rolled out ads 6 months after launch, and started offering freemium Pro accounts ($24/year) in early 2010.
Distribution: Reddit has always been a huge driver of traffic to Imgur.