Should I go to grad school for business with a psychology background?

I am a psychology undergrad who will be graduating next year in the summer. I currently am just perusing job opportunities to see what is out there and I see very little in the way of employment that is not sales. I wonder given the current economic climate is it more prudent to stay in school and go for an M.B.A. or try to find a job. I also would like to know if a psychology degree would go well going into a grad business school with little to no background.