Inspired by another question: what would you put in place of the CAPS LOCK key?

Most experts agree that the CAPS LOCK key on a standard computer keyboard is outmoded and a source of irritation – both for people who hit it aCCIDENTALLY, or from IDIOTS WHO CAN’T TYPE OR THINK THEY HAVE TO SHOUT TO GET ATTENTION.

So – if we were to stop making keyboards with the CAPS LOCK key, what would you put in its place? My choice is ’@,’ since it’s become such a useful character on the Internet. What’s yours?