As it turns out, this is a feature that recently became available for us to offer, SuFu.
I have gone ahead and enabled it, so that following these steps, you can opt to receive Daily Notifications, as opposed to getting Instant Notifications.
1) Go to Settings > Email (or click on this link: http://www.tudiabetes.org/profiles/profile/emailSettings)
3) Click "Save" at the bottom of the Email Settings page.
From that point on, you should start getting Daily (not instant) Email Notifications, summarizing all of the activity you normally get individual, instant notifications of.