With the passing of the CARD act many of the most egregious practices with credit cards have been eliminated for personal credit cards.
But not for business credit cards. A so-called business or professional credit card is not regulated by the CARD act so the advantages to getting one of these cards should be carefully evaluated.
While the enticements and rewards of one of these cards will be well-documented on the solicitation the warnings that you should heed will not be.
Check out this article Tricks and Traps for more valuable information on this subject.