Probably, the first question, which a developer can ask at the first launch of HarePoint Explorer for SharePoint, is going to be the following: "And where are the sites here?"
The answer is simple. In order to find the list of sites created in SharePoint, the following must be done:
From the first sight, this process may appear as complicated and tiresome. But attention must be paid to the fact that even during realization of such simple task, we get a lot of information about the object model of SharePoint! Particularly, it becomes clear that besides web-services, there are many other useful services in SharePoint: diagnostic services, timers, administrative services, etc. It is obvious that there can be a lot of web-applications, site collections and other items of infrastructure. All this information is irreplaceable for proper development of SharePoint solutions. Also it is important that all this information we get without write a single line of code, without any tests!