Definitely 5+ -
3 to start - one for home, one for our boat so I can watch it all summer, and one for the office. I'm setting it up to loan to all my co-workers who haven't gone to see it, in hopes they'll like it and start spreading the word to their friends or want to buy a copy of their own. I've already got a waiting list going.
Then I've got at least 3 birthdays coming up in May and June, and BBM will be part of the gift package I'll be giving, you bet.
Any of my friends who haven't seen it by Christmas will sure be able to guess what they'll be getting from me.