
This Wired story from September 2002 summarizes a couple of the most interesting things that you can now do with cremated remains, aka "creamains."
The ones that I've looked into are:
•Diamonds
•Artificial Coral Reefs
•Earth Orbit
The article also mentions an artist who incorporated cremains into paintings, however the website link no longer works. Obviously, some of these ideas have stuck around longer than others.

