Careful with credit card rates and read the fine print. Often the rate is good a few months as long as you pay your bill promptly and on time - and I've gotten three unexpected checks in the past few years from lawsuits where the rates were jacked up because the company was making sure they didn't cash the check on time. So the first month you pay the low rate, and the second time they jack it up to 19% and tell you that you were late with your payment. Also, make sure you get the bill paid off before the rate skyrockets - that's how these companies make their money.
But if you stay on top of it, pay it off promptly, and watch for (and call them on) and unexpected raise in the interest rate - they are practically free money - I have offers around here for 0% for six months.