<i>a heimish mom: i suggest you learn more about the over 200 orthodox rabbis that allow organ donations. please visit teh halachik organ donor website which identified them. you will find that calling them fringe rabbis is really a big mistake.</i>
Take a look.
I recognize Rabbanim there, although the major poskim are missing from this website, authorizing it.
And this is not a simple topic any way you looks at it.