There are quite a few tools out there that focus on fancy annotations and "easy" ways to share, but developers don't really seem to care about that stuff. They just want a minimal tool they can use to share a problem or explain details. 

Here are a few advantages over existing products:

* Allow for screen recordings that are exported as gifs
* Put direct links to uploaded images in your clipboard
* Integrate with the screenshot feature already present in OS X
* Offer free plan that uses links to base64 encoded images

Revenue will most likely come from a subscription for hosting images, although a small fee should also be charged for the tool. I'll have to take a look at what Skitch was charging and probably try something similar.

I have a little bit of experience building OS X apps, but I'd be able to help out a lot more with the image uploading service, payments, and the landing page (web development stuff).