That is really amazing idea. In quite a long time I haven't seen a startup that isn't just

a) pure entertainment b) automation/facilitation of some boring/mundane task

While the above are useful without a doubt, your service provides something more than just an utility - an enormous emotional value that I really admire. Once I prepared a kind of audio commemoration for incurably ill nephew of a friend of mine and I'll never forget the look of her eyes when she got this CD. I'm sure Artifact will provide such effects with greater intensivity and scale.