I've used this. It only makes sense for very small images. You basically have to lower your font size down to unreadable levels in order to even see an image of any reasonable size, much less edit it.
I love vim and like to keep as much of my development environment inside it as possible, but it's a text editor.
He's got a cool sense of humor too. Here are a few recent gems from his @tpope twitter account:
"My favorite part of the glaucoma puff test is how it always works the first time and they never end up blasting your eyeball over and over."
"Some people think 300 words isn't much. Me, sometimes I have to pad out even my tweets. Lovely weather today, by the way."
I love vim and like to keep as much of my development environment inside it as possible, but it's a text editor.