I could use this functionality as well.
As an example of my use case, I need to remember to claim the "Free Friday" coupon from my local grocery store. It's only available on Friday, so if I miss the deadline, I can't claim that week's coupon, period. However, I still want the task to reoccur the *next* Friday. I'd like the "missed" task to just expire, rather than to appear as overdue when I can't do anything about it anymore. Ideally, I don't want to have to go through and manually "skip" each task, because I actually have quite a few regular tasks that work this way.
Is there a way to accomplish this already? If not, maybe this could be considered a feature request? :-)
TIA!