i'd try to stick to it, get the gmat done, and get into an mba by the end of your rotational program.
or finish up your program, get another job elsewhere that's more along the line of your interests, take the gmat, and then try to do an mba, which should give you a stronger set of work experiences.
once you step on that accounting track, it'll be hard to get off and switch laterally into banking or consulting. so you'll probably need to just stick to it for now and try to switch careers post mba. that means you should do everything you can to prepare your profile right now for the best possible mba program for you.
Oxford Round 1 - interview invite 10/30/09, admit 12/11/09, ATTENDING 2010
My Road to Oxford and INSEAD http://gmatclub.com/forum/my-road-to-oxford-sbs-and-insead-89413.html#p676253