I wouldn't mind even if it were the same list of people as the comment notifier. I'd just like some way to know when my favorite AUR packages are updated, period.

You can check with more frontend from command line, like you do it in case of pacman operations, and at last you can use rss too, maybe is not a high-priority task.

There are more rss feed facility that can send email too, or gtalk/msn skype messages too, like this one -> http://inezha.com/
It's no worth to implement in my opinion, because it's implemented with rss facility.

I don't think we're going to implement this. If you want to keep your AUR packages up-to-date without checking the AUR website periodically, you should just use some AUR helper. cower [1], e.g., allows checking for updates using the "-u" command line switch (and downloading these packages by additionally specifying "-d", if you want to) without providing all those useless features some other fully blown pacman wrappers do.

[1] https://github.com/falconindy/cower