Not a hunting site per se, but backpackinglight.com has a lot of good info. You just have to wade thru "gram counter's junk" it to find what applies to hunting.
Great links. I'll second kifaru.net. Although I don't understand why there isn't more activity on the Kifaru site. The essays posted there are worth the effort alone.
Like others have said, Bowsite has some good'uns come along once in a while. Cameron Haynes from Eastmans has done his share to make some backpack hunters out there.
The rate EdT is going, I wouldn't be suprised if he has a UBB forum before too long