Maine is sweetening the pot to try to get homeowners to make their homes more energy efficient this summer. The state is offering a $1,000 cash bonus for home energy improvements completed by August 31, 2010, according to the Morning Sentinel. The new incentive is in addition to the $3,000 cash incentive that has been in effect since January to homeowners of all income levels, as well as up to $1,500 in federal tax credits.