Wireframe Annotations in Visio
http://boxesandarrows.com/archives/wireframe_annotations_in_visio_special_deliverable_11.php

Brown, Dan
Boxes and Arrows
2004

Abstract:

Few information architects tap the full power of Visio. For the IA, Visio is a means to an end—a mechanism for capturing some ideas on paper before they are transformed into graphics, HTML, and code.