GigaTux has written a technical paper detailing how we have worked with the Turnkey Linux team to enable this to work with the DTC control panel, enabling automatic installations of these appliances. Essentially, this means you can set up a VPS running MySQL, Django or a Torrent server (to name a few) within a few mintes.
See the article on the technical site.
Turnkey Linux comprises a set of free, Ubuntu-based software appliances that are primarily available for server-type usage scenarios, such as setting up database, web, forum, wiki and photo gallery servers. Each appliance is preconfigured to work out of the box, with ease of use being the primary goal behind the Turnkey Linux project.
This is extremely useful in itself, but if you wanted to experiment with these appliances, potentially to evaluate or otherwise test them, it would be great if you could perform installations with the absolute minimum of effort.