Best I can tell, it's gone. /item and /use give unknown command errors, and every combination I could come up with for /ac "item name" threw use errors.

Which is a shame because I wanted to use it as a macro at the end of a list of other self heals available to the warrior. A single button to hit for however many times you need a heal and the macro just grabs the next available cooldown. HQ mega-pots have to sit outside on their own button, blah.