for GWT fans,
if interested on creating AJAX Portlets for Oracle WebCenter Interaction Portal, I create a project on Google Code, which is something like start-up project. This project contains the basics you need to start a GWT portlet implementation for the WCI Portal. Before you check out the project, make sure that you install the GWT Eclipse Plugin.
The Google Code project calls wcinteractions. You can check out as a guest, but you will be not able to commit changes. If you do want to do this, do not hesitate to contact me.