Here are a few creative ways of disposing of cremated remains. I'll add more if find any.
http://www.celestis.com/
This service provides:
The launch of a symbolic portion of the cremated remains into Earth orbit
Flight capsule imprinted with personal message
Invitation to the launch event
Personalized video of launch event and memorial ceremony
Dedicated virtual memorial of the deceased on our web site
Contribution to the Celestis Foundation
Performance assurance
http://www.eternalreefs.com/
Eternal Reefs, Inc. was formed to provide an ecologically sound option for dispersal of cremation
remains. By integrating the remains into artificial reefs in various oceans and seas around the
world, we seek to provide "Permanent Living Memorials" that are ecologically sound for our
environment and cost effective for the consumer.