By the way, iOS 4.3.2 is (as far as I can see) still vulnerable to @i0n1c's untether vulnerability.
If true, this is excellent news! We'll let you know as soon as we get a definitive update from I0n1c.
I0n1c: "Well updating to iOS 4.3.2 over a hotel network takes years. Before I have done that can neither ack nor deny that the untether still works."