Here are some interesting examples on how SaaS solutions have been used
Estonian Ministery of Economics used Blogspot to host the Energy forum internet discussion. They only needed to register.....a couple of years ago they could have hired a web-design firm and bought hosting....well, this is not needed anymore.
The Estonian XXV song- and dancefestival media coverage is done with Blogspot and Youtube. In 2005 and earlier they should have bought a lot of server, storage and datalink capacity to host the training videos. Now they got it probably for free.