I'm leaning to using the header alert linked to a listing page they can look at or delete at their choice and pace, and leave the emails and pm traffic out of the mix for bandwidth and storage reasons.
So far, all I have is the header gif and the idea. lol
The PM VIEW page, however... with the check boxes and check all/remove buttons is the way to go though for the listing page I envision.
It would also be nice (and members have asked repeatedly) for what used to be called a "ping" list in the old forum days to alert certain members of a post and call/personalize them, kind of like the PM capability to name multiple members in the "send to" box with commas.
Anyway...like I said, more of a winter project when I'm stuck indoors but I think it has some merit