Toronto Group for UXD / UX (User Experience Designers)
To keep it simple, from the wikipedia:
User Experience Design (UXD or UED) is a broad term used to explain all aspects of a person’s experience with the system including the interface, graphics, industrial design, physical interaction, and the manual.  It also refers to the application of user-centered design practices to generate cohesive, predictive and desirable designs based on holistic consideration of users’ experience. In most cases, User Experience design fully encompasses traditional Human-Computer Interaction (HCI) design and extends it by addressing all aspects of a product or service as perceived by users. 
User experience (UX or UE) involves a person's emotions about using a particular product, system or service. User experience highlights the experiential, affective, meaningful and valuable aspects ofhuman-computer interaction and product ownership. Additionally, it includes a person’s perceptions of the practical aspects such as utility, ease of use and efficiency of the system. User experience is subjective in nature because it is about individual perception and thought with respect to the system. User experience is dynamic as it is constantly modified over time due to changing circumstances and new innovations.