Hi, I came across this website today. This man is retired and really interested in vitamin D research. He has some Vit. D book reviews and other info. He's a retired engineer. He has some other pretty cool health research he's done, too. Saw it at his homepage

author of site below's webpage... http://www.henrylahore.com/
His Vitamin D link...
http://www.vitamindwiki.com/tiki-index.php

This is a 'newer' site and he appears to be currently continuing to research this subject.