Speaking as an LDS myself (Mormon to those of us incapable of using Wikipedia), it's not official church policy or anything that 'R' rated movies aren't allowed- it's up to the parent, although ones with sex/violence/harsh language (which basically describes the entire movie category, but I digress...) are frowned upon since we don't really believe in society's morals of today.

Of course, this wouldn't happen and an R rating wouldn't be considered if Meyer hadn't suggested graphically (or something) the sex in the honeymoon. Which Hollywood loves to show. But honestly, I don't mind that the movie's being prevented from being R- from a business standpoint, that will make more money anyway. I was madder about the rumor that HP7&8 were going to be R, but that was just a rumor, thank heavens.