2 - option for setting max # of running jobs
5 - we should not assume that the cwd of screen is the same as ours
7 - global error indicators should be displayed in red
8 - Terminology: machine vs. host
9 - Detector of orphans (unused queue dirs, jobs on non-existent machines, non-queued jobs)
10 - When bex run uploads a temporary file, shouldn't it be more insistent on removing it on failures?