Dahlia Lithwick at Slate has this insightful look at the Khadr/Hamdan dismissals:
By far, the most stunning aspect of the dismissed charges against Omar Khadr and Salim Ahmed Hamdan—the only two Guantanamo detainees staring down the barrel of a military trial—was that the two military judges in the cases (not one but two, mind you) dismissed them sua sponte, that is to say, without significant briefing or argument from the defense. (It does appear that Hamdan made a motion to do so, but only immediately after Army Col. Peter Brownback had ruled in Khadr’s case.) That two military officers—Brownback and Navy Capt. Keith Allred—devised their own rationales for dismissing the charges is an astonishing development.