I was talking with a friend on Sunday night about various funeral traditions and he suggested "space cremation" as a way of disposing of bodies that would be simultaneously cool and effective. You'd shoot the body out of a huge cannon practically into orbit, in order to have it burn up on re-entry. This probably wouldn't meet with any level of approval from environmental agencies, nor would it be especially cheap or easy to fire a projectile of that weight to such a height. You'd want to be sure you got it right, too, or else someone kilometres away could get struck (or at least very confused) by a ballistic coffin.
Mokalus of Borg
PS - I wouldn't want to get falling ash in my eye and think it might be from a body.
PPS - I guess alternatively you could fire the bodies into the Sun.