I think as long as your skin is fairly normal, you can use it on dry areas of the face. I really don't moisturize my face anymore in general, I no longer believe it is necessary unless there are dry patches that makeup won't go over smoothly. Remember, it is a proven fact that moisturizing does not prevent aging or wrinkles, all it does is make your skin look better temporarily. Sun protection and staying out of tanning salons is the only thing that will help to prevent premature aging.
That being said, I use shea as a lip balm, eyelash conditioner, cuticle cream, and for dry elbows knees etc. Sometimes at night I will take a dab and let it melt between my fingers and then tap it onto my eyelids, just to keep the area moisturized so that in the morning my eyeshadow goes on smoother. You can even use it as a hair conditioner for dry ends or as a styling pomade for a piecey look or for a little texturizing. I get mine from an organic company called Splash Organics (splashorganics.com) They make an awesome shea butter soap too! Great company, I recommend all their products. If you live in NYC or the Poconos (Pennsylvania) you can buy in person, or you can get it online. Their's is the best shea butter I have ever found.