Alert supporters BEFORE I derail, not AFTER.
Currently supporters are only informed about it after you actually derail. This isn't terribly useful to me; at this point it's already "too late" to do anything to prevent the derail.
Support an option to alert supporters to the situation when a goal has less than X days to derailment, so that they can help motivate you to get off the coach or whatever it was you promised to do.

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Admindreeves (Cofounder, Beeminder) commented
Great point! I think this should be an option, but maybe not the default. Some of us are *constantly* "about to" derail. The whole reason we need Beeminder is because we're very deadline driven and always skate the edge. So our supporters would get spammed to the point of tuning out.