"The GNU Affero GPL, released in November 2007 and approved by
the OSI this month, is being viewed as both closure of a GPL
loophole and as a tool to truly transfer the collaborative and
community benefits of GPL to the software-as-a-service model.
AGPLv3 closes a loophole that many would have preferred to see
addressed by the GPLv3. However, because the ASP or SaaS loophole
was left in place with GPLv3 and GPLv2, major open source users
such as Google seem more than content to stay away from Affero and
thereby avoid sharing code and modifications in the same way the
software is delivered..."