The Path from Architecture to Information Architecture

Boxes and Arrows has a nice post about how architecture and 'information architecture' are related. In this post 'information architecture' relates to web site architecture. That is not how I define IA. But still, this remarks made in this post give food for thought.
By the way, this post relates well to Daan Rijsenbrij's inaugural speach at the University of Nijmegen, titled: Architectuur in de digitale wereld (2004) [English: Architecture in the Digital World].