After spending some time on Flex and AIR in my spare time - with Peek in Grails as result - I'm happily coding in Grails again. Ahh what a pleasure ;-)
Some time ago I wanted to create a real-life demo application in Grails. Back in May or June I took the MySQL Sakila sample database and started building a Grails application on top of it. I also integrated Yahoo! User Interface Library for a better and richer user experience like using the DataTable (see also the Grails YUI DataTable example).
As I continued working on the demo application I added a YUI MenuBar and customized the Grails scaffolding templates so it generates a YUI enabled user interface.
Currently I'm only using the YUI DataTable, MenuBar, Button and Grids CSS but I want to extend this to use the YUI Calendar, AutoComplete, Rich Text Editor and Charts and perhaps some other nice-looking YUI widgets as well. Under water it also uses required YUI utilities for easily sending XMLHttpRequests and processing JSON results.
I basically only changed the main.gsp, main.css and scaffolding templates and see below what can be generated.
I also created the Grails on Sakila project hosted on Google Code, so if you want you can browse or download the source code yourself. It is currently under development so you are warned.