Imgur is a very essential img hosting website. It was created by a redditor as "an image hosting site that just works". The guy has been improving it for quite some time and now he's realeasing a little nice feature (personal accounts see: http://www.reddit.com/r/reddit.com/comments/ank6i/reddit_ive_been_promising_this_to_you_for_months/ )
It is by far one of the best img sharing site and I wonder what it will happen to it in the next future. The idea is very simple, execution neat; just let's see what the business is.