As others have said, I'm already an organ donor and would gladly donate the unused parts for whatever purpose science can find for them. Perhaps I should donate my body intact to medical science. If they can figure out how I've managed to live this many years after all the abuse I've subjected my body to, perhaps there's something they can learn that will benefit others.
My will says that my best-case-scenario wish is for my body, minus any useful transplantable organs, to be donated entirely to science, and that no carrion-feeding funeral merchant ghouls be allowed to make a single penny off my death.
Whether your worldview is religious or naturalistic, the body is only the wrapper in which we live; once we die, the body no longer has any use, save as a subject of study or as a meal for worms and bacteria.
I'm an organ donor, and I'd gladly donate my body to science. My body is just a vessel for my mind, and doesn't define who I am, just what I look like. And it helps me move around, talk, see, eat, drink wine....etc etc ;)
Once I'm dead I really won't have the capability to care anyway, so no big deal to me.
Since I am HIV+ it is automatically cooties in the donor department. I will probably leave my body to science. But it will have to be under the condition that nobody has to pay a dime for this to happen.
Our bodies (my husband and I) will be donated to Science upon our demise, after our usable organs are removed. What’s left will be cremated. The same goes for our children until they can decide for themselves. I found a company called Anatomy Gifts Registry that does this (though I am still in the process of checking them out completely). There will be no burials or funerals. I think we have enough waste (landfills and bone-yards), I try not to contribute to their overpopulation. If some one in our families wants something to fawn upon (i.e. tombstone) when we're gone they have been instructed to plant a tree or donate to one of our favorite charities.
Personally, I'd like every molecule of my body to be used for something. I want to be recycled. Donate my organs. All of 'em. Give whatever's left to science to be studied somehow. Make a bird feeder out of my skull and a window garden with my rib cage. Any left over gristle or whatnot, compost it and feed me to the earth. Be creative with it.
"My that's a lovely ashtray"
"Yes, it's my old friend Seth..."