Hi Frank. I have a bit of a different opinion than my colleagues on content writing sites. I consider myself very online savvy and I have written for Suite101 and EHow along with a couple of others and found it just wasn't worth my time. I was being offered a few bucks for articles that were well researched. In the end, making 20 bucks a day for several hours worth of hard work just didn't seem worth it to me - but hey, that's just me
That being said, there are some writers who make a fair amount writing content for these sites, but from my experience this requires them to crank out lots of articles per day. I don't consider myself completely "old school" (lol) but I do think there is value added when you are published in say, Redbook or Parenting Magazine (or others) as opposed to online content sites. Yes, it's more difficult to get those gigs, but it makes me feel more important lol. So I suppose what I am really trying to say is that if writers want to get credentials and build their resumes, these are good sites to start with - but I think we shouldn't neglect to keep trying to reach for the "big gigs" in life!