Vaadin for Cloud-based SAAS Application

I am a software architect for a next generation product and feel Vaadin would be a great fit. I have only one concern. The application needs to be able to run in the Amazon cloud. Amazon does support “sticky sessions”. Is it wise to use Vaadin with Amazon in this fashion? Is there a non-sticky session version of Vaadin in the works? Eventually I feel all applications - even the line of business applications Vaadin targets - will need to run on the cloud.