I started a new addon called “Vaadlets”.
Declarative Vaadin UI’s with XML.
Please have a look and give me feedback 
https://github.com/ahoehma/vaadlets
Kind Regards
Andreas
Hi,
Thanks for creating the add-on.
How did your add-on different from http://code.google.com/p/xmlui/ ?
Cheers,
Chee Kin
With the vaadlets addon you will have a defined xml content via xsd, so you can create your ui templates with autocompletion.
I’m trying hard to support the com.vaadin.ui api with xsd … sometimes this will be not possible 