OK.
After having asked a lot of things around I've managed to create, deploy and use a VDB from iReport.
The tutorial is http://gioppoluca.blogspot.com/2009/06/teiid-tutorial.htmlif someone could need it.
Thanks.
Luca
Thanks Luca I added a link to the wiki main page - http://www.jboss.org/community/wiki/TheTeiidProject