It supports 2D & 3D hotspots, audio, video, and being extended via XML or directly via Actionscript (AS3). PanoSalado is based upon a (modified) Papervision3D core, and like Papervision is open source.
PanoSalado was begun in 2007 & formally announced in April of 2008. It was and continues to be a collaborative effort of Patrick Cheatham (Berkeley) and Zephyr Renner (Las Vegas).
PanoSalado can be used online in a Web browser, and offline in a standalone Flash Projector or as incorporated into an AIR application.