I've seen you mention this before. How does one go about donating their body? I might be interested in this option.
We signed up with UTN that Chuckie just commented on. In our case, we aren't concerned with how parts of our bodies will be used. After all, upon death, we won't be in them anyway. In checking their website at Chuckie's link above, one can see that they also have facilities in Florida and Arizona. If you want to check out more from them in person, UTN has (or at least had when we signed up) an office in Norman, OK.
However, according to their website, they may only have offices in the other two states. And, according to what I remember from signing up, UTN may not want the bodies if it isn't convenient for them to pick them up. We will probably call them and see what has changed since we signed up.