Expandable Table, Data Grid grouping in Richfaces?

[infinity2heaven]

I'm looking for a component similar to 'Expandable Table' in Icefaces
http://component-showcase.icefaces.org/component-showcase/

OR

'Grid Grouping' from GWT-ExtJs
http://www.gwt-ext.com/demo/#gridGrouping

But our environment is JBOSS Seam 2, EJB3 and Richfaces. (Richfaces strongly recommended in our org). I'm getting comfortable with Seam and was looking at Richfaces, although I'm not confident of any Ajax frameworks (except DWR). Is there a component in RichFaces ( Data Grid?) that can be easily customized with Seam to get the above component's look n feel?

I don't want to start off with RF and realize half through the project that it's diff to customize the component. I'd rather experiment on Icefaces or GWT-ext (which could potentially take more time learning the integration with Seam).

Any Suggestions?

[infinity2heaven]

I've spent one week trying to simulate a Expandable Table or Column Grouping using Richfaces PanelMenu and Columns components, but in vain.
It's quite frustrating to see how difficult it is to mix and match these components when customizing is needed. (the jazzy demo page is only good for marketing)

I would appreciate if anyone has worked extensively on editable datagrids with grouped headers/columns.

Thanks