Hey AG, Sometimes things happen a lot quicker than anticipated, and i'm glad you mentioned your petition which is a great idea and I certainly don't mind plugging it.
I know it's only a new petition in it's early days, but have you heard of Avaaz, their petitions are global, they are send out to everyone on their mailing list and they usually get some serious numbers up in only a matter of day's.
For example the petition in the link received well over 24000 signatures in only 4 days.
Just a thought that using Avaaz may reach a larger audience in a relatively short time span.
Cheers.
https://secure.avaaz.org/en/world_heritage_under_threat_ptn_aus/?tNfBtgb