I've notified Google. I note that *their* DCMA form promises your personal info will be removed before it's published (HostGator makes no such assurance). I also notified Google through Webmaster Tools.
I'm just not comfortable risking the publication of my personal info - it may be rare, but once something's on the net, you can't ever get rid of it. I'm definitely going to consult with a lawyer and see if there's not more I can do, and if not, have them write the letter so it's their contact info that ends up published thanks to HostGator's copyright-hostile policies.