wondered how long it would take for someone to make it as an icon awesome image although i don't think that the way you've done the side part of the glass (not the frame, just the part on the side of th iMac) doesn't look quite right and the CD/DVD drive is missing and so is the webcam. oh and not sure if it's just me being really overobservant but i don't know if you added the holes in the bottom of the imac or not, i think they're speakers or air vents or something, i have no idea haha.
but overall it's a pretty awesome image, well done
The icon looks great! The only two things I would have changed is lighten up (or make more transparent)the iSight camera on the top of the monitor and included the dvd and sd slots on the exposed side. I know that's being picky -but you did ask for a critique and I look at one of these every day