I think that even if LW was to do an automatic research on failed d/l's every hour or so, then that would be sufficient. There have been many times I've gone to sleep or work, came home, checked the status of my queues and found that they haven't even started (which is a real kick in the *ahem* when I only queue search results that yield 5+ results). Researching once every hour would not load up the server a whole lot would it?