Comment 6 for bug 648463

If there's a user called "me", should this ping them or the original user? Memo requires you to use your own name.

Other things to consider for a full implementation, especially if this is to be useful for memos:
* Remind users on other channels
* Save reminders in the database, so they survive bot-restarts

You also need to take timezones into account when *reading* times from the user (I don't know if we have helper functions for this).