Here are a few good sources of reading material on the Semantic Web from Universitiy couse material:
Semantic Web Course Material, CS594 "Semantic Web: Models and Query Languages" and The Semantic Web.
Jeff Heflin (one of the lecturers of the previously mentioned courses) has written Semantic Web Technologies for Aerospace (for the IEEE Aerospace Conference in March) :
"This paper will cover promising aerospace applications and significant challenges for Semantic Web technologies. Potential applications include higher-level information fusion, collaboration in both operational and engineering environments and rapid systems integration. The challenges that will be discussed include the complexity of ontology development, automation of markup, semantic mismatch between current object-oriented models and Semantic Web ontologies, scalability issues related to reasoning with large knowledge bases and technology transition issues."