This bot works on the same premise as ReplyBot, but instead of replying to the comments you find, it will send you a PM with a permalink to the comment that included your keyword.

Also works on submissions. See the DO_SUBMISSIONS variable.

NOTE: MailMe does not want to send mail if the comment that it finds was written by you or the bot. However, without the identity OAuth scope, the bot cannot retrieve its own username. This will not be a problem if you don't have the bot writing comments, but just be aware.