Other succulents, houseleeks (aka hens-and-chicks, or Sempervivum) I'm not sure if are also edible, though the gelatinous fluids inside I have used as an aloe vera substitute for scrapes, cuts and burns.
Fixed it - thanks Cal. There was a wayward colon gumming up the works.
I tried a leaf of a sedum yesterday. Only slightly bitter with a sort of purslane flavor. Not bad. It's a plant that's been struggling to regrow after the winter, so is likely a bit strong flavored until it gets a bit more lush.