Since it’s HTML5 (meaning it’s web based), there’s really nothing to install, so all you’d have to do is log in to Carbyn and you’re good to go! At the moment it appears to be running just fine on the iPad and the Blackberry Playbook, and support for smartphones isn’t too far behind.
If the concept is a little alien to you, Carbyn’s functionality is said to be similar to Google’s Chrome OS and Jolicloud, and is said to be able to work on pretty much any device with a modern browser. At the moment it doesn’t look like there are that many apps available yet, although Carbyn is looking to partner up with some developers to tailor make apps for their platform. It will be interesting to see how this plays out and if it could potentially prove to be an alternative to the current mobile platforms available today.