Dan,

If the 'flight pack' you're waiting on is a Cirrus MJ, the wait is about over. I got mine (finally!) Tuesday.

One thing we've found that you need to do is add a switch between the battery and ESC. The systems like the switch better than the crackle that comes from pushing plugs together. PLugging the battery in caused soe odd behavior in the servos (like running over 90 degrees and stopping/stalling). Tourning the power on repeatedly with a switch, however, did not cause this to happen, and the servos moved back around and started to work as normal after that.

FWIW, the new crop of servos turning up in the flight packs are much better than the previous test run of servos. The ones I got at least are much smoother and less jittery than the first ones we saw.