I already have a Mac, and paint.net is not going to send me back to Windows any time soon
@vertigo: We'll get some better reviews coming out soon now that the App is being beta tested though there might be NDA issues with that but give it a couple months and we might have something quite exciting on our hands. Also while I reckon it won't hit Photoshop too much in the high-end market where people have money to burn at the lower ends it might do very well. Especially with groups like students where if they are trying to be legal a Photoshop licence costs them £300 rather than £30 for PixelMator. If someone isnt a student then its £500 rather than £30. Either way you go thats a lot of beer money
Also PixelMator is cheaper than LightZone and is more Mac-like than Pixel
That does look pretty good, X11 is really the only problem I have with it but there is a OS X Native GTK+ project underway which would make it a much more enticing options.
If LightZone is Java then they could make it slightly more Mac like by putting the File,Edit,View toolbar in the right place. I know its possible cause I have managed to do it, but Java won't do it automatically. In my mind Java's UI to be "cross platform" it should adhere to "way things are done" on the platforms, but I can understand why that would be a minefield for development and Java Swing is painful enough.