InfoQ: Writing JEE applications with Grails and Flex
http://www.infoq.com/articles/flex-grails

Grails and Flex both have significant advantages in different parts of the software stack. In this new article you will learn how they can be combined to take advantage of each's strengths. Topics covered include component communication, data transfer, and JMS integration.

This article will go into detail about how to write JEE applications with Grails, a spin-off of traditional JEE application development, and Flex, a different technique that can be used with Java. Both frameworks can be highly productive. Combining the two frameworks holds the promise of building rich internet frontends to J2EE applications while retaining the high productivity.

JEE

Flex

Write your Google App Engine applications in Groovy

Google just announced that their Google App Engine cloud hosting platform now supports other languages than Python: namely Java and Groovy!

SpringSource Cloud Foundry

Spring等で作成したJavaアプリを、クラウド上で動作させるツール

The first self-service, pay-as-you-go, public cloud deployment platform for full-feature Java web aplications that unifies the entire build, run, and manage application lifecycle for Java. Cloud Foundry offers complete application lifecycle management for running Spring, Grails, and Java web applications.

SpringSource Cloud Foundry is the first self-service, pay-as-you-go, public cloud deployment platform for full-feature Java web aplications that unifies the entire build, run, and manage application lifecycle for Java. Cloud Foundry offers complete application lifecycle management for running Spring, Grails, and Java web applications by integrating the world's most popular Java web application technologies into an enterprise Java cloud platform that takes full advantage of the power of elastic cloud computing.