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 Zephyr Renner (Las Vegas) and Patrick Cheatham (Berkeley). In late 2008 Michael J. Rondinelli (EyeSee360) became an official contributor.
PanoSalado can be used online in a Web browser, and offline in a standalone Flash Projector or as incorporated into an AIR application. Included in PanoSalado's source downloads are Flex examples for interface development.
Announced in November 2009, PanoSalado 2 is the Flash 10 based next-version of PanoSalado. This is a complete rewrite, and is not reliant on Papervision. For more information see PanoSalado's Blog and a live demo. Also of note, the IVRPA will be hosting the open source repository for PanoSalado2 (along with Aldo Hoeben's CuTy).