I've heard that they are not. We go to the local shelter a lot to look at puppies, and a few years ago there was a little 8 week old puppy there that was so adorable. We asked about him, just because we didn't know what breed he was and the director promptly told us that they wouldn't adopt him out to anyone with kids (we had our son with us). We told her we didn't want to adopt him, we just wanted to know what breed he was, and she told us Rhodesian Ridgeback. I asked why they won't adopt him to families with children and she said that like Dalmations, they CAN be good with with children, but there are a lot of instances that they aren't so they don't like to take the chance. I don't really know if that's just their opinion, or if it's true. You might call a few breeders and ask them.
I have read that ridgebacks can be good with children, but are wary of strangers, and can be territorial. I went to a dog show once, and talked to someone with a ridgeback. I asked her if they were good with children, and she said she raises them, has had them around her children and grandchildren, and never had a problem. I guess you would just need to be careful of the dogs behavior around strangers more so than family. (and also around other animals)