Cloud Apps approved by GSA

The Wall Street Journal had an interesting article on the United States General Services Administration has approved the acquisition of some cloud services for use by the Federal Government including many of the Google Apps such as Gmail, Google Docs, etc. Since these services are for sale as well as freely available this sounds more like an admission that they can be used. Will other governments follow suit? But should they be used? That is really the question.
There are two sides to any government, the classified and the unclassified. These are general terms that quantify how the government can use services. While all services require quite a bit of security, classified utilization requires even more, in many cases what most would consider to be “uber-security” requirements. The types of requirements that impact usability in some way. Can these tools provide adequate security?