Working fine for me were you just signing in for the first time today or changeing characters probably got a server down shouldn't take long to get back on.
if u get the msg 'realm down', it is just a result of u flooding bnet so it has kicked u off for a short while as punishment... DO NOT try to constantly log in when this happens, it only makes it last longer... just take a break for 30mins or so and then try, if its still there leave it for an hr and try..
