internet/technology stocks now and in 1998/1999 is that there are some now which are reasonably priced based on traditional valuation metrics, including profitablility. SCLD is one of these.
Dark fiber refers to the current oversupply of fiber optic cable which is not being used. When fiber ooptic cable is used, it is termed "lit up" and hence "light fiber". The glut of dark fiber is what has caused the near-death knell of NT, GLW, JDSU, GX, as well as many of the F/O suppliers.