Webbynode is a new Xen based VPS hosting service, which targets developers who want to have control over every aspect of their server. This means you can have a single server where you can run your Ruby on Rails application in parallel with a Django application.
The service is currently in beta and you can register your email address in their registration page to get an invite. The advantage of testing the service during the beta period is that you can use the service free right now and once the service is out of beta, you will get discount over the regular price and if you are lucky you can even get lifetime memberships. 🙂
More details about Webbynode can be found below.