We will all buy it. Seriously. Tell your publisher that. TELL THEM ALL!
Yeah, I'd also prefer if it has less of a "diet" angle and more of a "health" angle. Great ways to incorporate LC eating into everybody's lives. A mix of information for newcomers as well as new tidbits for long time LCers.
RECIPES- a must! Week-long menus of the popular plans would also be good.
Nutrition articles about the benefits of certain foods. Like an article all about avocado! And lots of articles about how fat's not bad.
Current research also a must.
Interviews with low-carb gurus regarding their plans. Comparisons of popular plans in an in-depth manner.
A de-bunking the myths section is would also be good. Non low-carbers may want to be converted.
I like the idea of product reviews too.
And success stories would help the mag sell.
Please let us know if this idea is picked up. I bet you could arrange advertisement on this site as well. Great consumer base to start with.