well there are 3 regions for blu-ray currently i don't know of any movies that are enforcing the region locks.
A/1 North America, Central America, South America, Koreas, Japan, Taiwan, Hong Kong and Southeast Asia.
B/2 Europe, Greenland, French territories, Middle East, Africa, Australia and New Zealand.
C/3 India, Nepal, Mainland China, Russia, Central and South Asia.