Latest rumor I heard, from a reliable source, is that the hiring is for B747-400F and B747-400BCF expansion. Eventually new hires will go directly into the -400.

One more B747-400LCF will be here next month with three B747-400BCF to be delivered before 2011. There are plenty of B747-400F and B747-400BCF's parked in the desert. There is speculation that more B747-400's will show up and if so you can expect more hiring.

Like everyone says, believe the rumors when you are walking out to fly it.