I am not sure your method, another forum, is the right method.
You only need a single web page, stating what people should do, and maybe a counter that identifies how many site-visits the site has received.
The rest must be done:
(a)on any and all forums that already exist, with you and other freepers, and other like minded persons, telling people about the protest and giving the url for the web-page with the protest description
(b)with you and other freepers and other like-minded individuals to use all the blog, forum, member, comment web venues they go to, to announce about the protest and giving a link to the protest page
(c)with everyone also told to use their own Email address book to inform everyone in it about the protest.
A new separate place to blog will not perform - get what you want - better than a + b + c above.
This just my opinion, I did not start the web site, but think it is a good idea to have another site.
This protest will be more effective if it is much more than just a freeper event. Too easy for our opinions here to be dismissed as just "ultra right wing conservative thinking".
We can and should play an important role in getting this going.