It's really here.
Not that much of a surprise (MAKE magazine speculated on this as early as 3/06), but this does indicate the growth of this target demographic, as well as the ability of credit cards to profess your individuality (and/or addictions).
Your REWARDS come in the form of game time.
I remember a few years back going to a local specialty bookstore and paying for a purchase with an amazon.com card. Definitely got some grumbling protests from the owners there.
Should be interesting to see the types of reactions WoW cardholders will get in every day life.