Yes, all Blu Ray Discs are REGION FREE, however (I'm not sure, maybe someone else may help!), if you buy a BRD in Europe, it may not play in American Blue Ray Players because in Europe the system is PAL, and in America is NTSC.
Blu ray disc have 3 regions. Region A includes most North, Central and South American and Southeast Asian countries plus Taiwan, Hong Kong, Japan and Korea. Region B includes most European, African and southwest Asian countries plus Australia and New Zealand. Region C contains the remaining central and south Asian countries, as well as China and Russia As blu ray is HD(1080P) there is no pal or ntsc like earlier. Blu ray game(PS3) disc are "all region".also some studio like universal offer almost all their blu rays region free.