I re-read your questions. Here are some answers:
•How feasible is a Masters in Computer Science?
- very feasible. People can do M.Sc. in Comp Sci from all kinds of disciplines.
•Are there reputable CS programs that are known for taking grad students without a CS background?
- almost every reputable CS program that I know of would take grad students without a CS background, in the sense that their undergrad might be in another area. They would want some other indication that the student would be capable of handling the coursework, though, usually by their marks in some CS courses.
•What are some general thoughts about the field of Information Science?
- I don't know much about information science. However, given your stated goals, you will require a broader approach than you would get in a M.Sc. in Comp sci, and you will probably be better able to meet those goals by taking an Information Science degree. I'm sure you can still take any CS courses that you want within the Information Science course - at the grad level the course sizes are small so there is no problem taking another department's courses.
If I were in your position, I would go for an Information Science degree, but try and strengthen my comp sci background by taking some upper level undergrad courses. The value of the undergrad courses is usually higher than grad courses, because "cutting edge" information tends to get obsolete very quickly, whereas the undergrad stuff is all old hat and will be valid probably for 50 years.