Pixelmator continues to impress, and with every update, it's becoming a more and more robust little photo editor. Just recently, they laid out "a flight plan" on the blog for what they're up to for summer: the next release, 1.3, will be called Tempo, and focus on making the app just as fast as it is visually striking. And they make another bold claim as well: by the end of the summer, they're aiming to be "completely bug-free." Good luck with that.
But there's no question that development is rolling along for Pixelmator. The app is available as a free trial over on their site, or a full version for $59. If you're looking for an alternative to the 'Shop, Pixelmator is a great way to go.