Seriously, I had not noticed e.g. Jeff's edit here had he not also retagged my question.
Allow me to try a reasoning on why this (and a sharper e-mail notification) should get implemented.
I believe the internet is so good today because of the excessive amount of information and the great filtering on top of that which fits our specific need at any specific time.
That is what google is to the internet.
Just like what gmail is to emails.
And what a still-non-existent-SEN filter would be to notifications.
Sure, Google is the home to our beloved StackExchange Network, but as I increase my contribution it becomes harder and harder to keep track of it. To the point I can't any longer always find stuff I've participated in.
By keeping a centralized place with all our contribution (which this suggestion helps to add) it does facilitate the process. By having all that data on gmail also helps a lot. It's both a healthy redundancy and a second option to google search.
And, while it doesn't relate to the whole reasoning I presented here, it wouldn't hurt to also get instant notifications there as a bonus! (sorry, I can't help myself to stop insisting on this)
So, is this implemented now? I get a notification for https://meta.stackoverflow.com/posts/7931/revisions,
but according to comments on Recent feature changes to Stack Exchange this doesn't seem to work for answer edits. Maybe that is [status-bydesign], but I would prefer notification on all edits concerning my own questions and favourites (unless the fav-notification pref is unchecked).