I have good news for you - we are set for US release on December 5th! We have just released latest update in Australia and Canada, and it will go live worldwide next week
Changes for update 1.2 are:
1) Game Center Achievements and Leaderboards.
2) Free stuff section in shop
3) New gifts for best creators!
4) Speed optimizations (especially for complicated levels)
5) Stability fixes
6) New shop promotions