That's a good idea! Occasionally I vote to close but I never keep track on those votes and almost never come back to a question where I left a closing vote. And I'm absolutely sure I would use such a notification to leave a reopen vote if there was a significatant change or clarification.
I could - as a workaround - (ab-)use the 'favorite' star to mark those question, but, on the other hand, delete-marked question are not my favourite ones ;)
Some additional thoughts on such a notification feature
- It could be a good idea to limit notifications to edits done by the OP
- It could be a good idea to allow some sort of 'unsubscribe' to those notifications, otherwise the feature could be abused in such a way that the author just applies hundreds of micro edits just to annoy the 'closers' (OTH - a question can be deleted, a user can be banned from SO to stop that sort of flooding immediately)
And another thought - if people are aware that closing a question might lead to notifications, some might start thinking twice before they happily jump on the bandwagon.