I'll have to check when I get home (using remote terminal right now), but I think I have the IE8 upgrade on my older XP and I see the banner just fine.
I told my AV software not to block the clean blue banner and now I can see it.
I have no clue why it was blocking it in the first place.
I do know it blocks it again if I uncheck the acceptance.
It cool to see it again though.