PROBLEM
Current implementation of the Email template can traverse comments, but keeps recipients hidden.  While this may be OK in some cases, it causes confusion and extra work not knowing who is receiving notification.  It is not sufficient to use ${comment.creator} as other developers not commenting could have been added to the WI subscriber list.

CURRENT WORK-AROUND
One has to go to the WI, log in, and click on the "Subscriber" link from the "General Information" box displayed to the right of the WI information. Still would like this information available within the email notification itself for better efficiency.

SUGGESTED SOLUTION (RFE)
Create a "Subscriber" (like "${subscribers}) construct containing all subscribers, so it can be traversed and each subscriber included in a "Recipient" section of the emails.  Everyone receiving the email will know who else has received the notifications. This is assuming the actual recipient list is not available (it is not mentioned in the Email Template Variables) or email is sent only to individuals and not to multiple recipients (in which case there is no recipient list).