I do those all the time, and the window does annoy me sometimes. Usually use expose/mission control to see where my progress is at, though.
A notification center type popup with a progress bar would be cool, and something you could close if you wanted to.
Then again, people are needing the window less and less, and i'm assuming a notification pops up with the copy is finished, so there's even less of a need for contestant second by second status updates.
I mean, with SSD's and all the being the next big thing, I think that stuff is out the window.
That sucks if true. (the news that it won't be supported, not that if you're telling the truth

)