Can you substitute cola for an egg in a cake recipe?

I know that if you are using a cake mix, you can use a can of diet soda instead of the oil and eggs (Weight Watcher tip : ) ), but I don't know how it works when you make a cake from scratch. I suppose you could always give it a shot and see what happens. Also, just a warning, the cake won't rise as much as when you use oil and eggs. It will taste fine though; it'll just be a little bit denser.