^^ I had ordered a pantech burst full body shield from xtremeguard.com, it was shipped through USPS First class as well. Got it in ~14 days.
Seller gave a tracking number yesterday and somehow i think it is working now status is "Electronic shipping info received" is it real ? AFAIK USPS First Class Mail International is not trackable right..
Edit : http://www.dymoendicia.com/status/?PIC=LN356952045US it is showing tracking not available for this item.