A couple of thoughts on minor UI re-arrangement:
I find myself frequently clicking on the "Build Queue" link to have a quick peek at the queue, but then have to move the mouse all the way to the close link to close the window again. Making the link toggle the window open and closed would make this smoother.
The build overview page takes an awful lot of screen real-estate for each build. It'd be nice to try to get each build down to a single row in the display. In order to make this possible, I would drop the "run" button from this display. I would expect manual runs to be a relatively infrequent occurrence, and would rather explicitly go to the build's page to start it anyhow to reduce accidentally selecting the wrong one.