You really need a real home page. Having a guest account they can play with is awesome ... but it's not a good way to start it off.
When I come to the site for the first time, the first thing I see is an unexplained empty calendar. That's very confusing. You need a "this is what mealfire is and why it's cool" page.
UX is nice. I really like the way you do bulk-adding of ingredients and directions.
Nice idea. I can definitely see using it once I'm responsible for my meals.
Bottom-line, everything is good but the very-first impression, which is what's most important.