TL;DR: go to tsuru.io/try, signup for beta testing and get ready to start deploying Python, Ruby, Go and Java applications in the cloud.
What is Tsuru?Tsuru is an open source platform as a service that allows developers to automatically deploy and manage web applications written in many different platforms (like Python, Ruby and Go). It aims to provide a solution for cloud computing platforms that is extensible, flexible and component based.
You can run your own public or private cloud using Tsuru. Or you can try it in the public cloud that Globo.com is building.
What is Tsuru public cloud? What does "beta availability" means?Tsuru public cloud will be a public, freely available, installation of Tsuru, provided by Globo.com. "Beta availability" means that it will not be available for the general Internet public.
People will need to subscribe for the beta testing and wait for the confirmation, so they can start deploying web applications on Tsuru public cloud.
Which development platforms are going to be available?Tsuru already supports Ruby, Python, Java and Go, so it is very likely that these platforms will be available for all beta users.
It's important to notice that adding new platforms to Tsuru is a straightforward task: each development platform is based on Juju Charms, so one can adapt charms available at Charm Store and send a patch.
How limited is it going to be?We don't know what's the proper answer for this question yet, but don't worry about numbers now. There will be some kind of per-user quota, but it has not been defined yet.
People interested in running applications in the Tsuru public cloud that get to use the beta version will have access a functional environment where they will be able to deploy at least one web application.