I am going to do an online petition, where visitors can sign it with their name and email address. Any ideas how to automate this? I want to end up with a large text file with all the names so I can send it out to the companies I am doing this petition against.

Should I use a guestbook script for this or something? I don't want to use any cheap freeware stuff with buttons and banners. It's meant for this website: http://www.adventuregamer.com

Oh, and also, it should be possible for people to sign it from several different pages. Other sites are interested to fight for our cause too and put up a "sign the petition" box on their site.

I could really use some suggestions here