The issue with the F-35 (and with the F-22 once it gets L-16 transmit, due in 2014 with Increment 3.2A) is that you are on the network (outside your four-ship) or stealthy, but not both at the same time.
And as you move towards the next stage in net-centric, where instead of broadcasting all the time, every node transmits on demand (for instance, a "search" goes out for anyone whose sensors were on a given set of coordinates in the past few hours) the problem gets more interesting.
A networked stealth aircraft is like a ninja with Tourette's.