Harry's Use of an Unforgivable Curse

[nmjenson]

No: HPFGUIDX 95997

Anybody else unsettled by Harry's use of an unforgivable curse at the 
end of OotP? I mean, it should be punishable by lifetime 
imprisionment at Azkaban ... and he seems to have gotten away with 
it! Dumbledore didn't mention it to him .... he HIMSELF doesn't seem 
to realize how serious it was. I realize Sirius's death overshadows 
his emotions, but still.