Business students with a computer science background can now enjoy both worlds: take a data mining course with a business focus, and supplement it with the free course materials from Stanford Engineering school's Machine Learning course (including videos of lectures and handouts by Prof Andrew Ng). There are a bunch of other courses with free materials as part of the Stanford Engineering Everywhere program.
Similarly, computer science students with a business background can take advantage of MIT's Sloan School of Management Open Courseware program, and in particular their Data Mining course (last offered in 2003 by Prof Nitin Patel). Unfortunately, there are no lecture videos, but you do have access to handouts.
And for instructors in either world, these are great resources!