Having read the comments, I havn't seen what I find to be the gravest problem with this article - the poor OO practices of the author. Seriously. If you have a

Having read the comments, I havn't seen what I find to be the gravest problem with this article - the poor OO practices of the author. Seriously. If you have a family of methods on a user that only work in the presence of an instance of a project, then the first thing you ask yourself should be 'hey, maybe these methods belong on the project instead' and not 'hey, lets reinvent nil'.