Another Lost thread here...

A quick question about Libby who was murdered in the 2nd Season by Michael. Just before she was killed, Hurley and her kept saying that they knew each other from somewhere and kept putting it down to when Hurley trod on her toe on the plane before it crashed. At the end of that episode you saw Libby in the same mental institute as Hurley looking pretty darn crazy.

I just watched 'Meet Kevin Johnston' in season 4 where Michael is challenged by Tom to blow up the freighter ship owned by Charles Whitmore. Michael obviously feeling guilty about murdering her keeping having hulicinations of Libby. Now obviously she's dead, and I wondered if that story was ever picked up again of her being in the institute and known by Hurley? Bit of a wasted cliffhanger showing her in the mental home if not...?