Re: How do you go about donating your body to science after you die?

It's rather straightforward at most institutions -- 
Most medical schools have a specially designated Anatomical Gift Program 
(usually as part of the anatomy department of the school).  One would call 
them, ask them for specifics about the program, have them send information 
and the application form.

For medical schools in Massachusetts [other research facilities, agencies 
might have a need for donors too]:
Massachusetts has an Anatomical Gift Program, coordinated by the state's 
four med schools.  Information below if interested in contacting for more 
info:

Boston University School of Medicine
715 Albany Street
Boston, MA  02118-2394
phone: 617-638-4245
contact: Mr. Ted Dineen;  tdineen@cajal-1.bu.edu 
[http://www.bu.edu/anatneuro/AnatGift_program.html]                        
                         
Harvard Medical School
260 Longwood Avenue
Boston, MA 02115
phone: 617-432-1735

Tufts University School of Medicine
136 Harrison Avenue
Boston, MA 0211
phone: 617-956-6685

University of Massachusetts
55 Lake Avenue North
Worcester, MA 01655
phone: 508-856-2460

[the other 3 schools I couldn't easily find their anat gift program page or 
contact info]

Other --
-there seems to be a booklet available online (for $21! not including 
shipping and handling), that claims to provide you with all the facts.  I'm 
not sure how reliable the information is (though the website claims 
"approval" by quoting a fellow from Harvard Med School).  The sample 
excerpts seem sufficient in terms of information about different anatomical 
programs nationwide.  check it out --
www.bodydonation.com

Whole body donation can be quite different from organ donation.  If you 
want more info about that, try this site though there are plenty more: http://www.organdonor.gov