I have heard a lot about Spring Roo. So I really wanted to get my hands dirty in Spring Roo.
I am thinking of developing a Semantic Web Java application. The front end would be using JavaScript, jQuery. The DB would be MySQL using Hibernate for the OR mapping. In the business layer, Spring framework would take care of transaction management. RESTful services would be used in the business layer.
Additionally, the open source Jena technologies would be used to build the Semantics Web piece of the application. Using Protege-OWL, some OWL and RDF would be created and stored.
To make it available in the cloud, I am considering Cloud Foundry PaaS.
I'll keep you posted and let you know my progress.
