Provide the option to send email notifications immediately rather than waiting for the edit time (eg 30 mins) then waiting for the cron to process. This would be similar to the "Mail now" checkbox in the forum which puts the post in the list to be emailed immediately by the next cron process.

Also provide the option to include the dialogue message content in the email notification (perhaps keeping the option of NOT sending the content as well for privacy issues & shared email addresses??? up for discussion!!)