Once the item is submitted, is it okay to post it elsewhere, like my personal website? I understand once the item is submitted it becomes Paizo IP. I'm just curious when/if I'm allowed to put it out there what item I created.
Last year we had the 'losing items' thread, so I'd wait with posting your item on the internet until after the top 32 have been announced.
Don't shoot yourself in the foot by revealing it early.