"Rebate" checks from Uncle Sam

It appears that taxpayers will be receiving 'rebate' checks in the next 6 months, courtesy of Congress and "King George." It is supposed to 'stimulate' the economy.

Hmmmm. I've got to believe there is a catch. My question is - if the U.S has a deficit budget, where is this money coming from? Is the U.S Mint just going to 'print more money?'

Whose economy is this going to 'stimulate?'