OK--I know it's not a big enough sample size to get a real pattern, but here's what I know:
Today JetBlue extends their dates to 01.10.06, basically extending their dates out to 9 months.
I posted back on 01.21.05 that JetBlue had just extended their dates out to 10.31.05, again, basically extending out to 9 months, give or take a week.
So......the next round of JetBlue extensions, and the ones that we here in the Northeast are interested in for Feb vacation should be sometime end of June-ish?
Again, this is pure conjecture on my part, with only 2 date extensions to extrapolate from.