I'm waiting/surfing while SO4.5 transforms my tracks to rendered audio to get back a bit of my processor headroom.
It would be really useful if all the rendering happened in one "Rendering Queue" dialogue that would retain focus only within the SO window while in fullscreen mode. As it works currently, for every part that need to be rendered another dialogue will pop up in the centre of my screen no matter what I'm doing while waiting. I move the dialogue box out of the way, that process task finishes and closes, and another opens upon the centre of my screen.
From a workflow point of view I think a single dialogue that deals with the current cue would keep everything in one place, you could see what was done and what was left to do, plus giving it the option to not take focus in other workspaces, but remain within SO's fullscreen window, would make it a really useful addition. A tick box for "Alert When Queue Complete" would be the cream on top.