Can't remember where I read it, but pretty certain it doesn't pass yet! Beware when you install it though, as it overwrites your current IE, and is apparently pretty buggy.
On a related note, Acid3 has been released! There is a list of current and beta browsers and their scores at the link below. The best part of it is IE5.5 beating IE7!
Anomalous Anomaly » Blog Archive » Acid 3!