I'm a graduating physics major from Princeton University, and we have no programming requirement. I have heard a discussion among some of my fellow physics majors about whether some should be required or not. In the field I did my thesis in (experimental high-energy), programming (and Unix experience) were basic requirements. In other areas, such as Biophysics, I don't see it as being that large of a need, and other students aren't even going into physics after graduation. Princeton does offer an optional sophomore-only seminar on computational programming using Python (side note: a friend of mine regularly got Python to segfault in that class...), but that's about it, and I never took it.

Personally, I think it should be optional, but it should be made clear to undergrads that if they want to get into research, they'll need to know how to program, and so you should strongly suggest they take a course or two in the computer science department.