DChatterjee

Hello all,
I am interested in applying for a computer science masters program, someway down in the future.
The problem is I am not a undergraduate student in computer science.
My undergraduate major is in Math and Econ. I have a 3.62 overall, a 3.74 in Econ and a 3.68 in maths.
I got a 170 on the quantitative portion of the GRE's and a 153 on the Verbal portion. I also believe a 4.5 on the AW if that matters heavily.

I feel I am lacking in Comp Sci Knowledge though. The only few Comp Sci based courses I have taken at my Big 10 school include: Intro C++ Programming, Numerical Analysis. My knowledge is deficient in this field as you guys can see.

My math courses include: Linear Algebra, Real and Classical Analysis, Game theory, Discrete math, Abstract Algebra, Math Stats and Probability Theory, Diff eq's, and stochastic modeling.
My econ courses probably won't be very helpful so I wont list them. Although I am currently taking 2 graduate level econ courses at my university.

What can I do to get some background? I really do not wish to spend more money in undergraduate or non-degree coursework. Is there any maybe "accelerated" style programs which I can maybe catch up on all of the heavy gaps I am missing in undergrad, and possibly go straight into grad coursework? Also maybe some dual math and cmp sci programs? If so can anyone refer me to such programs?

Thank you guys very much!