One week after Austin, TX-based Virtual Bridges Inc. announced that IBM is using its flagship VERDE solution to provide virtual desktop management and provisioning capabilities for the IBM Cloud Service Provider Platform, Chelmsford MA based Desktone Inc. today announced two major steps forward on the road to ubiquitous public cloud-based virtual desktops – The release of Desktone 3.0, and its partnership with Rackspace Hosting to provide public cloud-based virtual desktops for just $1 per day.