Biosensing technologies are on their way to becoming ubiquitous in multimedia interaction. These technologies capture physiological data, such as heart rate, breathing, skin conductance, and brain activity. Researchers are exploring biosensing from perspectives including engineering, design, medicine, mental health, consumer products, and interactive art. These technologies can enhance our interactions, allowing us to connect with our bodies and others around us across diverse application areas. However, the integration of biosignals in HCI presents new challenges pertaining to choosing what data we capture, interpreting these data, its representation, application areas, and ethics. There is a need to synthesize knowledge across diverse perspectives of researchers and designers spanning multiple domains and to map a landscape of the challenges and opportunities of this research area. The goal of this workshop is to exchange knowledge in the research community, introduce novices to this emerging field, and build a future research agenda.