How do you substitute ground flax for eggs in recipes?

Here's a chart for egg substitutes:
http://chefinyou.com/egg-substitutes-cooking/

According to vegan references, 1 tablespoon ground flaxseed + 3 tablespoons of water = one egg

Here is a great article on the subject. http://dinersjournal.blogs.nytimes.com/2009/09/04/replacing-eggs-with-flax/