Documentation in the wild

I just started a new project.  I has no documentation except the code.

In this particular project, this is generally a Good Thing--the code in question is clear, well written, and (ahem) completely without comments.  I'm not having a lot of trouble understanding it, overall, because it really is very good code.  But... I've spent 2 days trying to figure out how one important feature works.

http://thedailywtf.com/Articles/Documentation-Done-Right.aspx

'Nuff said.