Nevers work, even your DEMO site
I'm returning to Css3 pie to see if there's something new.
However I jsut can't understand :
This never works.
I mean, looking at YOUR demo site using IE, dos not show the expected effects. (never)
IE9 shows only what it can do by itself (round corner, shadow).
Switching to IE7 mode (F12) nothing happens.
And I never saw it working when I tried to integrate it too