http://itextsharp.sourceforge.net/tutorial/
This is interesting. Jeff Julian showed me this while I was at DevEssentials. I am going through the tutorials now, and although they are in C#, I am finding that I can almost fluently read it.
iTextSharp, a C#-PDF Library. Very interesting program. There is one thing you need to set it up that you may not already have. Go here for the requirements: http://itextsharp.sourceforge.net/index.html
I may throw out some source code from what I learn if anyone wants it.