Credit Card Companies Boost Rewards, Incentives, As Consumers Ramp Up Card Usage

A new study shows that credit card companies are getting more aggressive about offering rewards and other incentives to sign up new customers. Need credit card experts to weigh in on what card companies are doing to, specifically, to attract new card customers. i.e., what rewards and benefits are in play. What should card customers expect? What credit score levels are needed to land good, new cards? Is there a danger in taking a credit card based on rewards only? What are the best card deals right now, and why? All comments welcome. Requirements: Credit card experts, financial experts, money managers, actual credit card users.