I found a wonderful article about curry leaves, in buzzle.com, written by Kanika Goswami. She says, Apart from cooking, the curry leaf has a number of medicinal uses also. It is an essential ingredient of almost all traditional medicine systems of peninsular India, sometimes with amazingly good results. Unani, Ayurveda and other systems use it to cure ailments such as piles, to allay heat of the body and are useful in leucoderma and blood disorders, and this has been proven by experts of western medicine also. In India, the curry leaf is used to prevent conditions such as nausea and stomach upsets. It is also used in treating skin irritations and poisonous bites. Its oils are invaluable as repellants and to cure skin disorders common to the tropics. More...
Also, Here's a post about the Curry leaves by Prabudesai in Benifits of Indian food.
Curry Leaves - 2 to 3 Cups
Wash Curry Leaves and Drain Water. Toss in a heated Pan for a couple of minutes. When its almost room temperature, grind the leaves with Ginger, Tamarind and Peppercorns using water little by little. Do not use more water.
Heat Oil in a Kadai and tamper the Mustard Seeds. Add the Asafoetida powder and then add the ground paste. Add Salt and Fry until all the moisture is absorbed.
Serve a teaspoon of this with a cup of hot steaming rice and a spoon of ghee. Mix well and enjoy the delight.