I will say that when I got through to the Schwab global desk, the guy I talked to seemed comfortably informed about the whole issue. It didn't provide a channel for me to get shares, but at least it was a channel to get the approximately $2 a piece for the rights I had.
With the way this has worked out, I would be surprised if it were not the case that most US held shares by individuals will expire worthless, but I have no idea where the shares are held and by what size institution. The Yahoo Finance page on holders is close to useless.