Getting the petition on the NSS website is pretty unlikely in my opinion but anything can happen. Your best bet is to contact WM Shrewsbury (
president@caves.org) and ask.
EDIT: I was looking at the figures and if we want to force a response to the petition from the government everyone really needs to get involved and spread the word. The petition has averaged about 104 signatures a day which is pretty good but nowhere near enough to reach 25000 by May 13th. We need to average about 984 signatures per day to meet the deadline. That is a huge task for any group but it can be done if everyone works together.