Thanks for moving this, Tyler.  The fact that the original question concerned a cooked foods version of zero carb diet on a raw paleo forum, begged for it to reside in hot topics.  
Nicola, I quite agree that bone stock soups are very valuable.  As many of you know, I began eating RVAF about 1.5 years ago.  I have never quite given cooked foods the boot completely (mainly due to family life) - I eat 60-90% raw daily, increasingly RAF.  I eat only paleo foods plus wine on occasion.  The majority of the cooked foods I eat are in the form of soup stocks which have been simmered in water and a bit of acid like lemon juice or coconut vinegar for over 24 hours.  Beef and lamb are the main bone stocks I make, although if I can get fish bones and heads in season, that is also great.  Poultry I do to a lesser extent.  I make them nearly daily.  I eat them every other day, especially in winter.
There are a ton of minerals and connective tissues available with stock preparation.  It is, imho, a great use for marrow bones once the marrow has been eaten raw.  Why not?  I realize some of you have to eat all raw for health, or choose to be all raw for other reasons.  But I would have to say that bone broths are by far the most benign (and perhaps) health-giving cooked foods around.  In addition to what Nicola said, this article spells out why these foods might be a good choice.  
http://www.townsendletter.com/FebMarch2005/broth0205.htmAnyone with digestion problems might do well to transition to raw using stocks to help them along.  Also, I try to keep to a middle path in my life.  After veganism, I found that any total all or nothing approach is probably not a good thing for me personally.  So while I totally love RAF, and I will never go back to dairy, grains or the majority of my food cooked again, I feel this one food does make sense.  As a highly-trained martial artist in my 40s, I think my joints thank me for adding this food in my diet.  It is impossible to eat bones raw, unless you are talking anchovies, and I do eat those whole.  Gnawing on joint bones of big land animals is something my dog does better.  So that is my reasoning, and here endeth the sermon.