Sonoluminescence
Provides history, properties and theories (Wikipedia).
 
Physics News Graphics: The Sonoluminescence Process
Provides a four step theory on sonoluminescence.
 
Sonoluminescence and Medical Ultrasound
Provides diagrams of what sonoluminescence may look like close up.
 
Sonoluminescence Experiment: Sound Into Light 
W.A. Steer's account of his work to construct apparatus to enable the observation of sonoluminescence, to investigate its basic properties, and leave a kit and instructions to form the basis of a future final-year undergraduate experiment.
 
Single Bubble Sonoluminescence
Provides detailed instructions on how to produce single and multi bubble sonoluminescence.
 
The Chemical and Physical Effects of Ultrasound
Provides background on how sonoluminescence can be used in chemistry.
 
The Casimir Effect: Physical Manifestations of Zero Point Energy 
Describes the connection between the Casimir effect and sonoluminescence.
 
Sonoluminescence.com 
Maker of sonoluminescence kits. Provides instructions and suggested experiments.
 
Boosting Sonoluminescence 
Accepted for publication in 1996, this paper describes how a bimodal sound excitation can enhance light production.