I have an extremely similar situation in my app. I have a large tree structure that is displayed on every page. The tree can have arbitrary numbers of nodes so lazy loading is must. I needed to be able to do drag-n-drop to move nodes and folders. I first tried icefaces but had to give up because of their drag and drop support was pitiful (it had no way to add javascript hooks for things like confirm dialogs --i.e. 'are you sure you want to move this node?'). Then I tried Richfaces, god was that a nightmare. Their tree datastructure is truly bazaar and I found the performance to be horrendous. I basically wasted 4 months on icefaces and richfaces (though it's possible that their implementations have gotten better in recent versions). Then I tried ext.js and just passed my treenodes via json from a servlet. This solution has been perfect. Tree response is very fast, and I can control the drag and drop operations any way I want (plus their dnd implementation is designed to handle many many nodes). my 2 cents.. dustin View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4088970#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...