Answer:
The military pay tables differ greatly each year and depending on how long you have served, but as of November 2009, assuming a Brigadier general has over 18 years of service, they will be paid around $10,299.00 each month, not including housing allowance and other add-ons. For the complete pay tables, see the related links!
By the way, a brigadier general is an O-7 in relation to the charts, so use that as a reference.