It's really easy and quick to set up your site. You don't need any special knowledge; everything is web based and the program walks you through the steps. There are a variety of privacy settings -- including making people sign in to see the posts. You can also upload photos and there's a guest book where visitors can reply and send encouraging messages.
Oh yes, I forgot to mention the price -- it's free. Yep, you read it right. CaringBridge.org is a non-profit organization that operates by donation. I started my pages about a year ago and have not once received any promotional material asking me to donate. (On the side bar of my web site there is a button where people can contribute to CaringBridge.org if they wish to.)
CaringBridge.org made keeping everyone "in the loop" easy and stress free. I highly recommend this service.