I am not being able to upload my panos to Facebook or Photosyth. It keeps saying "Network Error". I am having no connectivity issues with my other apps.
Sorry to hear you're having this problem.
From what Photosynth team member, Adrian, says, for the time being you can try tapping the 'retry' button five times. This will tell the app to stop trying to resume the previous interrupted upload and completely start over from scratch with a brand new upload of the pano. He also says that this problem should be fixed soon.
Here are two recent discussions on the topic. I hope that helps. ツ