This thing is shit hot.
It's coming for the DS as well, but I'm having a hard time believing it will compare favorably with the demo I just ran through. Grab it for yourself, toss it in PSP/GAME/NPEH90001 and dig in. You can adjust loadouts on any member of the squad they give you, but there aren't many weapons available here. I think it looks great as well, but I found the destructible environments and precise line of sight features very appealing. When selecting an enemy to attack, that UI element that comes up is asking you if you want to add Action Points beyond the cost of the attack to improve your accuracy. At least, that's what I think. Also, I think you might be able to reserve some AP to attack enemies that cross your field of vision during their turn. At least, I think. I'm not sure.
Oh well, I guess I'll have to play it again.