Tax Time tip - get 2.63% back on your tax payment

Here's a fiddle I saw posted on the net. A credit card being promoted on the net gives 5% cash back for the first three months while the IRS only charges a 2.5% fee for using a credit card. Thus you can pocket the difference, if you have to pay taxes:
http://www.bankaholic.com/2008/get-263-cash-back-on-taxes/