UPDATE: WHOIS.SC managed to import the first 10,000 signatures and duplicate the PetitionOnline system on their own servers! (great programming job) This means you can still sign the petition (apparently 5000+ more signed up at PetitionOnline.com, but I don't have that data backed-up, as they signed up after I went to sleep).
Click here to add yourself to the newly mirrored ONLINE petition