i agree, keep an eye on BO....
i just closed one of our Bank One CC accounts ~ it had a "reward program" (1 point for every dollar) for years. we stopped using it when we rec'd a notice that they were discontinuing the program about a year ago. then we rec'd new cards in 10/03, with inserts & on the CC holder which announced the reward program was in effect (the new cards even said Bank One Rewards Card).
so we use it (we charge heavily ~ college tuition, car down payment, everyday "stuff" ~ & pay in full every month).
so i called to "cash in" after charging quite a few grand ~ as per their CS, "it must have been a mistake...........there is NO reward program with the card"
very poor CS, including a "supervisor" (all with an arrogant, "tough luck" attitude). of course we cancelled the card. (i saved all the paperwork ~ just not sure who to report them to, or if it's worth reporting........

)
unfortunately, BO cards have the rewards programs we actually use ~ we still have 2 Bank One Reward Cards: a Reader's Digest that gives CASH

or GC's, & the Disney (as well as a First USA Sony (free/discounted Sony Products), & Delta AMEX (Skymiles)).
just watch Bank One ~ keep an eye on your statements, carefully look over ANYTHING they send (& btw, add up your charges each month ~ they "accidentally added the statement charges incorrectly" more than once on my brother's statements).