...people may be waiting for a VERY long time for the IS version of this lens.
Personally, I couldn't be happier with my EF24-70 f2.8 II.
+1 I'm extremely happy with my EF 24-70 2.8 II. Would I like for it to have IS? Sure, but I'm taking lots of great pictures without IS now.
If the IS lens would be as large as Radiating suggested, I'm not sure I would want one.