Square Enix posted a Materials Usage License Agreement on the beta test site authorizing beta testers to talk about their beta experiences and post screen shots that they have personally taken, for non commercial use. This was confirmed by admins from FFXIVcore with representatives from S-E.
So there you go folks. You can't post or link to movies, but screen shots and beta experiences are now okay.
Please disregard this post. It seems that Redyoshi already posted the same thing. Sorry for the "spam."
Edited, Aug 11th 2010 8:42am by KarlHungis