XP is so old I think the security updates will be over with by april 2014 or something. Anyone who actually wants IE updates should have upgraded to Windows 7 or 8 by now.
Not to mention IE9 and 10 have tracking protection lists that can double as adblock filters if you know what you are doing. Otherwise expecting microsoft to support almost every old version of windows will just mean that it will take far longer for anything to get done.
They already are taking their sweet time releasing IE10 for windows 7.