I've turned on some new software that will let users with Universal Hub accounts get e-mail notification when somebody posts a comment in specific discussions - hopefully without bombarding people who didn't sign up for them this time.
If you're logged in, you'll now notice a "Subscribe to: This post" link at the end of every post. To get notifications for that discussion, click the link and you'll be asked how often you want to get notices (immediately after somebody else replies, or bunched together every X hours).
If you post a lot yourself, you might get tired of clicking that link all the time. Instead, click on My Acct at the top of any page, then Edit. Scroll to the very bottom and check "Autosubscribe," which will sign you up for notification for any discussion you either start or participate in.