I'd second that motion to shut this one down. It seems like a source of conflict. I dont really consider .223 a deer round, myself, but I dont have such strong feelings about it. I think each individual hunter needs to understand the strengths and limitation of the cartridge, the rifle, and (most importantly) themselves.
The other thing that never comes up is that there is more to making a humane kill than just bullet diameter. Shot placement, bullet construction, and animal size are all just as important. Heck, if you're a lousy shot you could probably wound a deer with a .50 BMG.
I say each hunter should know what they can or cant do with their rifle. If you've been killin deer with a .223 by the dozens, and never wound one - I say keep it up. Obviously you're doing something right. If you dont feel comfortable using a .223, by all means - use something bigger.
I'd bet almost every hunter has wounded or lost an animal. If you're an intelligent rational human being, you probably felt terrible about it, and vowed never to do it again...and you probably know darn well what you did wrong. I know a couple bow hunters who have wounded and lost more deer than I can count. They're the kind of idiots that give us all a bad name. Does that mean bows are inhumane? Not at all. It means they need to reassess their abilities and make the necessary adjustments.
There's no reason this topic should lead to so much endless butthurt. Its silly, and now that I've been thinking about it, I believe my stance on this subject can be summed up in one sentence: If you have to ask, the answer is probably no.