You mean something like when WebMAN-MOD or CC or etc. is loaded on the PS3's XMB? That little message: 'xyz got loaded'? Yes, that would be nice and quite doable. I think part of the code which is used for message-screens can be reused, but it shouldn't fill the whole screen, but only a certain small field and if this is gonna be implemented I suppose it is better if a theme could change the position of the 'Pop-up'.