I have been dissecting popular Web 2.0 REST-based Web Services in building a new site that should (hopefully) prove to be popular. It's my second major site launch, the first one being acquired by a Microsoft funded startup years ago. I will reveal more details after the launch, but I've become both more and less of a fan of REST as a result of this exercise. REST is, of course, easy to use. But the problems with data accuracy have been frustrating.