What is the tall growing shrub with very sweet smelling flowers that is blooming now?

You are describing the Tea Olive (Osmanthus fragrans). This upright growing, evergreen shrub starts blooming in the fall and continues into the spring. Although the individual blooms are very small their fragrance is very intense. We count the Tea Olive as one of our favorites and highly recommend planting them for a vertical accent and for their rich fragrance.