A quite long and detailed piece from the Microsoft Journal for Developers. It's not techie, although the focus is on interface design rather than websites.
However, it is a good introduction to the subject if you're looking for something more detailed and includes useful references to other work and a few books.
The Power of Personas - article by Charles Kreitzberg and Ambrose Little for MSDN Magazine
One particular resource that caught my eye in this article, which I need to go back and read properly: Persona Creation and Usage Toolkit - paper by George Olsen (PDF download)