What Josh said.
BU's film program is one of the best in the country. The tuition, however, is a killer.
The program requires you to take liberal arts courses in writing, philosophy, multi-cultural studies, social science, math or natural science and foreign language. These classes normally dominate your schedule for the first 1 1/2 - 2 years in the school. The earliest you will take a film production class is second semester of sophomore year, unless you have a butt-load of transfer credits.
This type of program is a turn off for many, but for me it was a selling point. The goal of the liberal arts courses is to make you a more competent and worldly thinker and writer. Some some film students view it as a waste of time and sort of unhelpful when it comes to filmmaking, and some think it's vital. I think the latter.
If you want to start taking film classes right away, do not go to BU.
If you want a cheap school, do not go to BU.
If you want to develop your writing and thinking before you pick up a camera, go to BU.
I'm currently an undergrad student and I work in the Communication building, so if you have any questions, ask away.