Theory on Demand
Institute of Networked Cultures has a theory on demand project (just think print on demand). Available via pdf or print on demand. If you used something like Papers on the iPad you could then include this in your reference collection. Alternatively you could make an iPad specific version, but while that might have lots of clever bells and whistles at the moment I suspect most of us would gain more value keeping it as pdf simply because of all the apps that can do useful, scholarly like things with your pdfs.