On a brighter note, though, it turns out iDisplay works just fine (and is cheaper).
Guess I'll give iDisplay a try, since I found the functionality quite useful...
As someone else pointed out, civil disobedience carries with it the risk of arrest, and Manning must have known that if he was discovered, he'd be brought up on charges. It's also become increasingly clear that the unit he was a part of was shockingly lax in terms of discipline and security procedures, so some of the blame for the leak has to rest with the commanders of his unit. Nonetheless, the fact that Manning is on trial is a logical outcome of his actions; his treatment prior to the trial, however, has been documented to have met international definitions of "cruel and unusual punishment". Being locked in a cell the size of a small bathroom, kept naked in cold temperatures, and kept from sleeping for long periods are not humane methods of imprisonment.
I don't actually know what his personal motives were for his actions, but I applaud the actions themselves. The U.S. government/military has been involved in some heinous crimes in Iraq, and saying "everyone knows that" is not the same as being able to watch video of a helicopter gunship hunting down women, children, unarmed men, and journalists. That alone, to me, justifies bypassing "normal channels" to bring the evidence to the world. Among other things, that caused the Iraqi government to refuse to continue the policy of not prosecuting Americans who committed crimes in Iraq under Iraqi law, and that's a primary reason why all the troops are coming home, rather than leaving a token force behind.