Project Management Application, for the Mac

I was wondering when a serious PM app would arrive on OSX. Here's one.

At my day job I've hired someone with some in-depth MS Project knowledge, and once you learn a few of it's deeper features it becomes more and more useful (and less frustrating). It's a shame MS doesn't make Project for the Mac. When I use my Mac at work I've got to fire up Parallels to reach our Project files.