Just a random comment for the IE8 issue. We have IE8 here on our enterprise network. IE9 is approved already, but who knows when they will actually setup a package for it and push it (they are really slow about it, sometimes years). I would rather keeping using standard flex web-apps than use an JS IE8 version that has made lots of special considerations. After all IE9 is the first version that (to me at least) starts working better and supporting standards.
-Mark
