[Tom Bunch]

Templates are simply a matter of convenience. They will be right there in the File -> New from Template menu, saving you a couple steps. You can pick any one of them to be your default template, which will be used when you hit cmd-n (even faster). You don't have to remember where you kept your template projects, and you won't accidentally modify your template and save when you meant to Save As, blowing away your good starting state.

OmniPlan 2.3 improves the document template preferences a little, telling you something about the template settings.

-Tom