From Saltwater.eu today there's a comparison of PHPFog and Orchestra, two services that offer cloud-based scalable PHP deployments that can happen at the push of a button.
I am evaluating these platforms in order to see if either one can ease my sysadmin burden. Well, so far, as with any cloud service promising the next best thing since sliced bread, I got mixed feelings. For the moment I tested just the free tier of both platforms. While Orchestra uses a pay-as-you-go model, PHP Fog asked for $29/mo in order to drag that number of servers slider. That's a little bit much for a plain evaluation aka not so cloud-ish model where you don't need upfront investments.
The reviewer walks through the setup of each side - the server creation and configuration, how things are handled with the load balancer, the caching layer, the application server technology stack, app design considerations and the deployment process.