"Current Report queue" > "This table refreshes automatically every 5 seconds. Reports will expire after 30 days, please save the output if you would like to keep it longer."
I had no idea how long it could take for a report to be created (I only asked about 26 users, I thought few seconds). Refreshing is boring, as is keeping the tab open and checking it regularly. Low priority, but I'd like to have some sort of notification; even just changing the tab title as most AJAXy pages do nowadays (e.g. Twitter when there are new messages in the page) would be better than nothing. Or give some estimate of the time needed.