Thread transferred to Credit Card Programs forum because it is of general interest and not specific to manufactured spending.
Friends and internet forums are not the best source of tax advice. Applying for a "business" credit card does not create a business. Even if you have a business, transactions on a "business" credit card are not necessarily related to that business. The label that the issuer attaches to a credit card is not as important as how the card is actually used.
For an introduction to what you would need to report, start here:
http://www.irs.gov/taxtopics/tc407.html