The Plan

Low Carb ... suggested best for people with big bellies (as opposed to big butts or big all over)
How many carbs a day?

If you are trying to lose body fat, 20-70 grams are recommended - depending on your level of activity. See the link, further down this page, listed under Sources and Related Links.
Read more:

Low Carb Foods: http://www.lasting-weight-loss.com/low-carb-foods.html

http://wiki.answers.com/Q/How_many_grams_of_carbs_are_recommended_per_day#ixzz16V1CIBv9

http://www.sparkpeople.com/landing_free_plus2011.asp?gclid=CLz2kNyvwaUCFRtqgwodL2-XXg