Hey, Initially, we had a "wall posting" feature. User signs up via facebook and it will give them an option to post on their wall. However, I realized that if

Hey, Initially, we had a "wall posting" feature. User signs up via facebook and it will give them an option to post on their wall. However, I realized that if we require wall posting permission right up the front, that would really put off a lot of people. You see facebook doesn't allow us to change permission half way and this is one of the drawbacks of the facebook API (even if you like it, you can't force a permission change).