Opera's latest technical preview includes something called Opera Widgets. These are basically self contained web pages that use liberal doses of JavaScript and get displayed without decorations.
The concept of an Opera Widget is something that I've thought Jabber clients could use to display stock tickers, weather agents, maps, and whatever else without having to hack each and every client. Since Opera is using your typical web protocols, these widgets are left to poll until a server dies.
Just imagine if these were powered by XMPP? And imagine what JEPs we need to define to get there...
