I was watching “River Cottage - Autumn” yesterday on one of the E4 channels and a new use for cemeteries has been found:
Use the spaces between graves to grow fruit and vegetables.
Fantastic idea, I like the idea of being fertilizer when I go.
I am an atheist and I like graveyards. I used to go to the big Jewish cemetery up the street from my school when I was in college and “steal” names for characters in my stories. There was a small area that was obviously a cluster of graves of tiny babies, and there were a few stones that just said “Sarah” on them – which, as I understand it, is like “Baby Doe” for a baby who died without a name. Since Sarah is my name, I found it very cool, and sat with the little Sarahs and did my homework more than once.
I don’t have any particular love for being buried in a box, but I would love a monument or statue in a cemetery, because I love the interesting statues and monuments when I go visit and I would want to intrigue other people of a similar bent in the future. My little way to live on. 
From my non-athiest point of view I see little use in dwelling over this mortal coil once I’ve done the appropriate shuffling off. I dislike the idea of taking up real estate to hold my bones forever so I definately wish to be cremated. It would be kind of cool to have my ashes interred in a nice decorative urn or ground up, mixed with a polymer and molded into something. Having my ashes molded into a small statue of me should be sufficently creepy.
However I do see the value of old cemetaries. When looking back over records to research geneology, burial information can be the difference between finding a link or not. But I think our record keeping is currently sufficient to allow anyone searching for me several hundred years from now to find me pretty easily.
Just look for a small creepy statue of a fat guy with glasses.