For my entry in the TransIP VPS-competition (“Build an original application for a virtual private server”), I’ve build a web-application that allows you to view MRI-datasets in an interactive manner. This app (“VoxelViz”) is very much in development, but you can check it out in full-screen here (when used to show different single-subject data for e.g. teaching purposes) or here (when used to show group-level MRI results).

The single-subject viewer is also included below (but go to the original webpage for a larger/better view):