Don't worry. Using the Read-Only mode allows anyone to view threads and all that, but you still need to join to post.What if we want to check out the sprites and the sort? Will we then have to join up? And if we want to talk about combust - . Well, looking forward to being in yet another social forum.
EDIT: I think everything is good to. This is the link to the forum: http://forums.terraria.org/index.php?social-forums/weekly-spriting-challenge.384/
We'll start posting stuff there Sunday. If something is not correct, don't forget to tell us.