Hey there, Delta767,
You would only have a URL for a pano to share if you'd already uploaded it to Photosynth.net or Bing Maps.
Are you sure you're trying to share your pano from the section of your app's library of uploaded panos instead of locally stored ones on your phone which haven't been uploaded yet?
If you view any pano (that's already been uploaded to your Photosynth.net account) from your app's library and share to Facebook, Twitter, or Email, you'll see your pano's URL there to copy + paste as you please.
Alternately, you can just bookmark http://photosynth.net/userprofilepage.aspx?user=Delta767 in your web browser and copy the view link to any of your panos.