Sure - 90% of cell phones have at least a mediocre camera built in. But in my day pack I carry my Canon A650 IS, a 4AA, 12mp camera that IMHO is the cat's meow with it's rotating view screen.

I am on construction sites all the time as part of my work so it just makes sense to document everything. It also came in handy when some "baby-on-board" twit rear ended my vehicle. I was able to document the evidence including his very short skid marks before hitting me! Needless to say, HIS insurance paid for the repairs and car rental, etc. and he picked up the deductible.

Luckily for me, I didn't have a back or neck injury from his carelessness.