I do not receive any kind of newsletter from Subeta, but I have seen it mentioned several times. Do I need to sign up for it somewhere?

You just need to have a valid e-mail.

You can check to see if the e-mail you listed is correct under Site Prefs > Email.

Ah-ha! It appears they're going to an older email address that I haven't checked in awhile. Now I know to keep better tabs on it.
Thank you! ^_^