The Elements of Photoshop

While I don't know why anyone would rather spend $99 on Photoshop Elements, rather than spending $999 on Photoshop CS3, extended, I guess it should be noted that Adobe has finally released Photoshop Elements 6 for Mac. 

And there was much rejoicing. Or not. I am a Photoshop user, but I'm wondering how this new version of Elements compares to some of the new Mac graphics programs that have come out recently, specifically, Acorn and Pixelmator, which are quite a bit cheaper. I know Elements has the Adobe name, but Pixelmator is pretty good for what it does....