The font used on the apple keyboard is VAG Rounded. The one in the icon looks to be a bold version of that, not comic sans as mentioned before. I agree the white "s" looks classy. I wish icon factory had gone for realism.
It looks elegant in the dock, no?
Even unbolding it and making it look more like a macbook key looks nice on the new icon. Can't go wrong from "borrowing" from apple's designs right?