The advantage of using only Amazon.com is that I don't need to store the person's address. Also, I don't really need to store anything about the item. I might

The advantage of using only Amazon.com is that I don't need to store the person's address. Also, I don't really need to store anything about the item. I might morph it into any Amazon.com product that isn't necessarily on your wish list. That way, you can pick an item for a friend and tell his/her friends the URL to collect the money.