A Spectrum

So the current scuttlebutt (I really wanted to use that word) is that Dom will be appearing in 3 episodes as Charlie. Will that be in alternate timelines, as a vision to Hurley, or Is he Alive?

Apparently, when he showed up at the Lost panel briefly, he held up his hand and written on it was "Am I Alive?" I was too busy, trying to get a picture and failing, to notice...