[k3n]

IMO it has a different place than GIMP, and they actually co-exist on my system. GIMP is more of a PhotoShop clone, whereas Paint.NET is more of a PSP clone and/or MSPaint on steroids. I've found that PS/GIMP are usually best for creating a production-quality image from scratch or for touching up full-color photos, but Paint.NET is best for doing informal graphical work (mock-ups, screenshot annotations, etc.)