Yippee! So glad they finally added this feature.
In the email I got, these were the deets:
Now available on Chowhound: Email notifications! That means that you can get an email when someone comments on a Chowhound thread that you've started or commented on.
Because we don't want to bombard anybody with notifications, we're launching the service with an automatic opt-in only for less frequent Chowhound users. (You can opt out on the Notifications tab in your profile.)
If you are a Chowhound regular (thank you!), we're starting out by NOT opting you in. But if you would like an alert when there's activity on one of your threads, please go to the Notifications tab in your profile to opt in.