Destructable Icons

[United_Strafes]

So what do you get when all the Icons have been found in both games?

[MrCrunk]

GLaDOS's pie

[WarewolfIX]

On Xbox there's an achievement for getting all the symbols but that's all I've been able to find on this. Seems like its something that got left in the port for no reason.

[Cruseydr]

Is there even a way to tell if you've found all of them in a level?