Some Chapter ideas (in no particular order):

Visual Commuications
Theory and Practice of Modeling
Useability Modeling
Information Design Models
Systematic Investigation
Model Themes and Forms
Composition and Presentation
Modeling Information Flows
Modeling Thesauri and Defined Vocabularies
Content Structure
Traceability Between IA and Development
Information Organization
UML and Information Archecture

Anybody interested in specific Information Architecture topics as pertain to models, modeling, or design?