Ed,

You might want to take some time and read some old threads about how to maximize mileage. Hybrid mileage is VERY dependent on how they are driven (very light throttle on acceleration and cruising), how long the trips are (short trips are a KILLER), wind, rain, battery pack charge, etc, etc. Some of these factors you can eliminate with driving techniques, some you just have to live with. It also takes a few hundred miles of watching the IFG (instantaneous fuel gauge) to get a bit of feedback on your driving technique. It took me 3-4 weeks before I really understood how the actions I was taking (driving "normally" for my old car) were killing the mileage on the hybrid. The computer will register the correct MPG immediately (within a small margin of error).
Good luck and enjoy the learning experience. I'm sure in a few weeks You'll be doing much better.

Eric