I have started using Google Sites this year, and I am very happy with the format of it (which I originally was skeptical of as I was used to the pbworks format). At this point, we use it as a class for projects, plus each student has their own site that they use a reading portfolio, I have also used it professionally. We have a large conference being held at our school this summer, and using a site as allowed for easier communication, documentation, and organization (and eliminated a lot of emails!)

One thing I hope to see Google improve, is the ease in which you can move pages. Students struggle a little with the dropping of folders into one area and end up dropping them in the wrong place and leaving them:(.