It depends significantly on what you're programming. This summer I've used a bunch of Calc III and applied geometry because I was working with map projections. However, the most generally useful math for Computer Science is math logic. This includes both boolean logic -- programming is full of AND, OR, NOT, and the like -- and more formal math logic like Gödel's Theorem and formal language theory. Linear Algebra is also used a lot, solving systems of equations with lots of variables.

CU requires Calc I to take Data Structures and Calc II to take Algorithms, but I don't think you actually use much from Calculus in those courses.