For those of you considering the Spider Holster; but reconsidered because of the price ($150+), consider this:
http://cgi.ebay.ca/ws/eBayISAPI.dll?...m=110963040455
$37 and its a real energy / neck / wrist saver for the long walks. You almost forget you're walking with your camera; even with a 70-200.
I love this frigging thing.