With the exception of my cds, all products at Jaguarwoman Designs are delivered electronically, via a download link to the zipfiles which is emailed to the customer automatically.
For the cds, I use standard mail and do not charge separate postage unless the product must be shipped overseas. If the product must be shipped overseas, I check the cost of postage and add that amount to the total cost of the product.
Delivery by electronic download is also possible for the cds, although I am willing to provide both the physical product by snail mail and the immediate electronic download. Since these are large files, a great deal depends on the speed of the customer's internet connection. But I try to accomodate any reasonable request.