ESRI’s ArcWeb SVG Viewer
It loads and you can turn on and off the “widgets” with ease. But navigating it was impossible. I know zero about developing with SVG so I suppose someone else will have to comment on if it is possible to create iPhone compatible navigation for SVG apps. Heck if ESRI were to make a ArcGIS Server SVG API compatible for the iPhone, every ArcGIS Server implementation would be viewable on the iPhone.