A couple of links that we like:
LCHF – The Hub SA: This is what really kicked it all off for us. This thread is even mentioned in The Real Meal Revolution Fat Shake recipe… : )
Mark’s Daily Apple: Mark Sisson is a Paleo proponent and does all the research that we’d like to do, but can’t be bothered. His site is well worth perusing. And if you ever think to yourself “I wonder…” go and do a search on his site – he’s probably wondered the same thing already, and researched it too.