Our work with video-over-IP has also caused us to begin looking more carefully at the application of virtual reality and immersive technologies. The use of these technologies in the physical sciences is well-established, but their implementation in other areas is not as widespread. For example, providing omnidirectional video may improve the ability of ASL users to participate in videoconferences. Or capturing classes in streamed 3D video may make possible closer analysis of group interactions. We are currently developing testbeds for these applications, in cooperation with IPIX. SunSITE is also working on 3D and 4D visualization of geospatial data, in cooperation with the Advanced Visualization Center and as part of our participation in the Southern Appalachian Node of the NBII. We are currently working on a project to demonstrate how Southern Appalachian land cover has changed over the past 300 years, due to logging, diseases and pest infestations. Also scheduled is the completion of the Tennessee River Gorge project, which will allow users to view information regarding the topography and select biological organisms located within the 25,000 acres of land that are carved through the Cumberland mountains by 26 miles of the Tennessee River. SunSITE is helping the Partnership for Neighborhood Improvement/Empowerment Zone explore the possibility of a virtual recreation of historically Black neighborhoods in Knoxville. This project will not only integrate a range of digitized media — audio, video, still images, text and 3D — but will also allow UT to expand its understanding and expertise in the area of mobile computing.