Projections for new aircraft are hard to come by. Flex will only buy what they have sold. They are adimately against having large portions of aircraft that are unsold. So, new aircraft projections are best guesses. With regards to 60XRs and 605's, if an owner buys one, we'll fly it.
As for hiring, the last number I heard was 100 pilots in 07. Attrition is hard to get a handle on. You don't have to retire at 60 here, so you can't look at the seniority list and pick out those that have to retire in 2007. I do know, Flex has hired quite a few retired airline pilots (over 60) and I can't imagine they'll be here for a long time. You might see a huge attrition soon. However, about 90% of the pilots here love their job and don't have plans to leave any time soon. So attrition is a crap shoot.