I published a page on the creation of a Vaadin theme in a Liferay Theme.
This page explain step by step how to create a new Liferay theme and how to add the Vaadin theme.
With this solution, it's possible to associate dynamically a new Liferay theme to a page to change the Look and Feel of the Vaadin portlets used in the page.
http://liferaylive.blogspot.fr/p/integration-of-vaadin-theme-into_11.html
