Taking a page from Steve Jobs' book, people often don't know that they want something until you show it to them. I apply this to my work as a photographer and explain how in this piece.
- Android/iPhone app indeed seems like a must, maybe not even so much for ease (tho that would help), but for branding of Eat.ly as a legit product in the consumer's eyes.
- I wouldn't be into the health aspect personally, but I would be into the food porn aspect. It seems too complicated guessing calories etc. BUT maybe you can have two "modes". Turn on "Food Porn" and that is what you get, switch to "Health Porn" and that's what you get. I probably would peek at both.
- This is probably not doable, but if you could integrate menus (like menupages) and calorie counts from restaurants, people could take the picture, pick the food (like on foursquare you pick the venue) and post. Food numbers would come along.
- Single player mode would work better in health mode than food porn mode. You could have numbers to strive for, but then why would you post pictures really? You could just post food.
- Multi player mode could work for sexiest looking food, or for "I'd Eat That!" points. Maybe unlock a badge swarm style.
- Not to mix day job with side project, but it could be pretty sweet to integrate the Eat.ly app (if there will be one) with a "post to foursquare" option so that if you check in your foursquare status can have an eat.ly link to a picture.