Time was, UHub had a system for letting you get notified when somebody replied to your comments. Then, that just stopped, weeks, maybe months ago (I didn't notice until somebody asked me about it a few days ago, and I realized I'd somehow deleted the software that handled it).
E-mail notification's back on. I've set the default to "off" (don't want to send somebody e-mail they don't want!). There are a couple of ways to get it back on - and to be notified of posts in certain categories:
First, you need to register an account, and to be logged in with it.
Second, you can do nothing.
In that case, if there's a particular discussion that's going fast and furious and you want to be notified of new comments (you know: Turkey flies into a bicyclist crossing the Green Line tracks just as the mayor is about to dedicate a new skyscraper or something), every UHub post now has a "Subscribe" link at the bottom of the story. Click on that and you'll get notifications of all new replies for that post.
Alternately, if you just want to know when somebody replies to one of your comments (or articles if you post those), you can tell the site to alert you in e-mail - you can do the same thing if you want to be alerted of new posts for particular categories (for example, you could get an alert every time there's a new UHub post about Roslindale or development).
Click on My Account at the top of any page, then the Subscriptions tab and then Settings. Check the box next to "Auto-subscribe to comments." If you ever post an article here, also click on "Auto-subscribe to new content." The third choice is "Auto-subscribe to updated content," but you don't need to check that.
If you'd rather get a bunch of notifications in a single e-mail, rather than getting one for every single reply, check the box next to "Digest mode."
Under Preferences, you can decide when to get notified about replies - as soon as they come into the system, just once a day or something in between (Digest mode would be kind of useless if you pick ASAP for this, would be great for "once a day"). I'd strongly suggest you NOT check "On Updates," because otherwise, you could wind up getting zillions of e-mails when I update my posts (with no copy desk and a maniacal desire to post as quickly as possible, I update posts A LOT with grammatical and factual fixes).
Hit Save Settings and you're done.
To get e-mail notification of new posts in key topics, click Categories at the top of your Subscriptions page. Check off whichever topics you want, and hit Save. It'll use the same settings as above for determining when you'll receive your notifications. NOTE: There are some topics (bicycling and wildlife) that are not yet on the page. I'm working on that.
Finally, if you want to just turn off notifications altogether (you're going on vacation, for example, or you've gotten sick of UHub messages), your Subscription page has a Delivery of Notifications link. Click on it and you can turn all notifications off (or turn them back on again, for that matter).