This has been an interesting debate and Ive enjoyed reading both sides of the argument. I have a few questions.
I'm answering for both sides since we have lived both ways over the years....(And by the way, good questions...)
For those of you who use CC:
1. You say you pay the balance each month (terrific!) does that mean you have an emergency fund in place or would you just rely on your CC for emergencies?
Yes, we have a fully funded emergency fund. We also keep seperate accounts for smaller emergencies (home or car repairs, etc.) We have not used our credit card or home equity for anything "big" that might be considered an emergency by some at this point, but who knows, life changes sometimes.
Most of the time, we find that what one person considers an emergency, others do not. For example, we went all summer without A/C in our car because we decided not to get the repair done when we are saving for a new car next spring anyway. I had friends who couldn't believe we wouldn't spend the $750 necessary to keep it running until next year and a family member who couldn't believe we wouldn't just go get a new car now rather than waiting (We have a good down payment, but not enough to pay a car off).
It was really hot and not very fun, but no way were we going to pay that huge bill just for a couple months of comfort or buy before our car fund is maxed out.... On the upside, we saved a ton of cash on gas because we only drove when we had to. 
2. Do you ever fear that you might lose a job and have a balance on your cc that you wouldnt be able to pay?
I will always fear a job loss, but not because of what we put on our credit card each month. It's usually less than $1,000 and we would pay that off immediately upon a job loss.
We also are NOT afraid of taking the axe to our other luxury items if a job loss came. We have in the past and would again. We've lived without cell phones, long distance calling, internet, cable (any TV whatsoever, actually), eating out, two cars, credit cards, A/C, and all the other little luxuries that can really add up and we would do it again in a minute if one of us lost our job. I am aware of what our minimum living expenses would be (utilities, house, car expense, groceries) and know that we could afford them on one of our incomes, it just would NOT be fun.
We learned all these lessons the hard way back in 2001 when we had credit card debt, a new car we really couldn't afford (once DH lost his overtime) and topped it off with a very sick child and thousands in medical bills. Thank God, we had decent insurance with a $5,000 cap out of pocket, or we might still be paying that off.... And thank God, we had family to help with our daughter, and were working two different shifts so we could be in the hospital with our son and continue working. If one of us had to take off all those weeks it also could have been a catastrophe.
For those who only use cash:
1. Why do you feel that CC are bad even if the person pays them off monthly?
I can give you one reason why even I think CCs could be bad even when you pay them off monthly. You still might be spending "more" each month just because it is soooo easy to buy thoughtlessly when you are not watching the money disappear directly from your wallet. Well, the Oreos aren't on sale this week, but DH really likes them so What the Heck, throw them in the cart, ad nauseum... Watching the cash in hand dwindle before your eyes is much more compelling.
2. If you ran through your cash due to a huge emergency or illness and needed essentials (food, gas) would you then use a CC to get them?
Can't even guess at this one since I think it would be very individual and not related to whether they use credit cards regularly or not....there are a lot of things people might consider in a serious emergency that they otherwise would not.
Not being judgemental to either side, Ive enjoyed reading both sides. I will say up front we use cash only, but we are irresponsible with cc and will not allow ourselves to have one again. With us, everything becomes an emergency or necessity so we just use cash and its harder to justify spending it.