Well, it's certainly not a bad thing. Still, they interview tons of people that don't get in. If you are confident in your numbers, experiences, and reccomendations, don't blow it on the interview, you'll have a good shot.
Of course, it also depends on what school. Are you talking about SGU, Ross, AUC, Saba? Or maybe Spartan? I'd assume an interview is much less of a guarantee of admission at SGU than it is at Spartan.