Finally I found something to test the SyncML capabilities of my new Sony Ericsson P800 Smartphone ;-)
* http://sync4j.sourceforge.net/ (has JBoss support)
* Do you know some more? Mail me!
Let's see, if I find a better way to synchronize all the PIM applications I'm using (P800, Outlook, KOrganizer, KAdressbook, Mozilla, ...) both at home and at work.