I posted a code change that will delete the event when the related post is deleted a while back in one of the earlier version threads. I'll have to search for it. It's pretty simple though.
Is the event timestamp more than one field? I forget but I don't think it is. I thought Dave_L mentioned something about condensing the time/date fields into a single timestamp. If that's the case then the null value wouldn't work. I guess it's a matter of choice though.
