I applied and was approved for an American Express Blue for Students in December 2002. I don't use it much (only when I'm buying used books online from Amazon Marketplace or Half.com sellers) but if you're looking for a good customer service experience if/when you have problems, go with AMEX.
My credit limit is $2500, but I don't even care. The most I ever spend on it each month is $50. If you're (as a student who likely has a PART TIME job) thinking of spending >$500/mo. on stuff with a CC, then you have a spending problem and you probably shouldn't get a card. Since you're a student, I'm assuming that you DON'T have $500/mo. to spend on stuff.
EDIT: the reason I'm lecturing you is because a credit card should be used to take advantage of the CREDIT CARD COMPANIES...not to have them take advantage of you. If you pay off your bill each month, you're getting at least a 15-day grace period to pay, and you're also able to take advantage of their great customer benefits (travel insurance, customer service help, etc.). If you're carrying a balance, then you're paying the credit card companies for something that should and can be free (delaying your payments). If you can't afford to pay for something right then and there, then you sure as hell can't afford to pay for it with interest in a few months.