“Note: that visitation reminds me that Claire visited Kate which I’m almost certain means she is dead. But, I don’t remember seeing her die yet and I have spent the last six months watching every episode. Does anyone remember that happening?”
It may have been when Locke’s group was attached at the Others’ homes. Claire was in a building that was blown up, and Sawyer carried her back into Ben’s home. The way Miles treated her seemed to indicate that Miles knew something was different or unusual about Claire.
Interesting point. Didn’t we see her wake up and respond to Hurley bringing in Aron? And didn’t she also run away with the others when the military troup were sucked up by the smoke monster?
Clare’s warning to Kate came in Kate’s dream — Kate immediately awoke in terror, remember?
But all the visits from dead people (Charlie, Christian, Dave, Ana-Lucia, etc.) came while the visitee was wide awake.
So I don’t think you have proof one way or another on whether Clare is dead.