I like my revolving 0% credit cards, too, but I couldn't keep track of them when I was working (more than) full-time, and if you can't keep track of them, they're a losing strategy.
Now, however, I have graduated to part-time work, and I have a nice chart with all my 0% cards, and their expiration dates (when they start charging interest). It helps to have the capital to back this up: if you can't pay them before they charge you interest, they'll be a very bad deal.
Anne