True, and I didn't mean to suggest that people should just use my application instead of this. I guess I was just pointing out that this to me is a simple feature (one that I think I added in less than a days time to our app) and they've turned it into a full-fledged product that they are charging for. As the commenter above stated, I guess once you have the rep of a 37signals you can charge for this sort of thing.