If the whole world knew what you ate all day, would it motivate you to make better food choices? That's what the folks behind Tweet What You Eat (TWYE) are hoping. 

TWYE is a Twitter-based online food diary that is updated in real time via the web or a text message. And unless a member has opted to keep their diary private, the 15,000 (and growing) members of TWYE get to see what you eat, all day, every day. Most users do go public and the founders admit that this has been key to finding success on TWYE. Users might think twice before gorging on cake, cookies, or donuts if their diary is open to all.

To learn how to use TWYE, read more.

Basically you text or tweet what you eat throughout the day to TWYE, including calories. You can also submit calorie-burning activities to get a more accurate reflection of everything that's going in and out. If you don't know how many calories a particular food item has, that's OK, because the site has a database of popular foods and their caloric breakdown. At the end of each day you are given a grand total of the calories you took in.

The service is fairly new, so all you can really do is track calories — there's no breakdown of fats, carbs, or nutrients — but it's a great tool if that's all you're interested in doing. It seems incredibly helpful for those times when you're on the go, since you only need your cell phone to make an entry.

Would you use TWYE?