I don't agree with any prison time. This is one of the reason's the country is in so much debt! Remember, it costs $35,000-$45,000 per year to imprison someone. For non violent crime? This is absurd.
A means of punishment should be used that keeps the person productive, yet makes the point clear that the behavior will not be tolerated. I don't exactly what this would be - but clearly the answer is not simply 'imprison' someone for just any crime, especially non-violent ones....
-Chris