For those questioning the use of Google App engine as a serious platform for applications, we at Pulse use Google App Engine: http://googleappengine.blogspot.co

For those questioning the use of Google App engine as a serious platform for applications, we at Pulse use Google App Engine: http://googleappengine.blogspot.com/2011/11/scaling-with-kindle-fire.html http://googleappengine.blogspot.com/2011/11/scaling-with-kin... So, yes you can build serious applications on GAE but like everything else it boils down to, it depends on what you really need.