bter.com also - sign up here so i get some referral credit
https://bter.com/signup/4780 (you also get 10% off on trading fee for 6 months)
and vote for SJCX here
https://bter.com/votingyou get 10 votes per hour
* correction you get up to 10 points an hour once you have some bter points which you get from trading
I am surprised that STORJX hasn't been listed on other exchanges except POLO. It will probably be listed, after all the services and applications are launched.