There are currently about 40 software bundles in Turkey Linux's virtual library, including Joomla, Wordpress, and Moodle. According to TurnKey Linux, these virtual appliances are optimized for easy deployment and maintenance. And as the name implies, launching an instance with one of the virtual appliances is very simple. Custom passwords and authentication, as well as automatic setup for EBS devices and Elastic IPs, are part of the setup process.
According to their website, "Packaging a solution as a virtual appliance can be incredibly useful because it allows you to leverage guru integration skills to build ready to use systems (i.e., turn key solutions) that just work out of the box with little to no setup. Unlike with traditional software, you don't have to worry about complex OS compatibility issues, library dependencies or undesirable interactions with other applications because a virtual appliance is a self contained unit that runs directly on top of hardware or inside a virtual machine."
Currently, the TurnKey Hub launches on an instance volume in the EC2 Cloud. But according to the developers, support for additional cloud platforms, as well as automatic backup and migration functionality, is in the works.
TurnKey Linux is a project started by Alon Swartz and Lirax Siri. While there are other turnkey cloud offerings, including Dell's, but TurnKey Linux is firmly grounded in the open source community and not only strives to make the move to the cloud easier, but contends that a well-integrated and thoroughly tested virtual appliance can help facilitate open source adoption.