I just had a question regarding you are planning to implement some way of using XBAPs in MP NG? Or is it impossible to make the skin crossover to the hosted XBAP perhaps... ? This would be a great way for plugins such as "My Trailers" to distribute the plugin, since such plugins really don´t need more than sandbox previligies and the version handling is a simple way to make certain that the clients all have the latest version, or perhaps I´m way off 
/Simon
/Simon