Quoted from robin:E-mail notifications in one way or another is a feature that has been on our to-do list for a long time, I hope to add it in the not to distant future!
On a related note..... robin , does the mention feature do anything? I guess not, as it wouldn't even highlight your name after I clicked it. I'm hoping / expecting it will at least drop an icon somewhere showing you were mentioned when logging in.
UPDATE: I see after I posted it (and re-upped my + donation status) your name is highlighted. The question now is....do you see or get any notification that it was posted and you got mentioned?