(I also used to use it for sending messages to other people, delayed until after the next nightly build of my various free software. So I'd check in a fix for the bug they'd just reported, typically, and immediately send them a message saying "Try it now", which they wouldn't get until the version available for download from my web site had updated. Unfortunately, this occasionally made me look silly if the nightly build failed to happen. I always vaguely intended to enhance the queue feature so that the sending of the message could additionally be made conditional on some arbitrary Unix command returning a success status, but I never quite had the energy to think the details fully through and do it.)