My recent research involved developing a Layar layer that lets you plug any geoRSS feed (such as a Yahoo Pipes map mashup), into an Augmented Reality navigator. This vastly simplifies the job of getting dynamic content into AR:
 

 

 
feeds come complete with actions for viewing embedded media content directly from Layar:
 

 
I’ll be publishing this Layar in the next week, for general use.