If you're into getting on mailing lists for games... I'm not sure whether to suggest this one or not.
On one hand, Greg Stolze and John Tynes, who are both incredble writers, both post to the list, as does John Nephews, the current head of Atlas Games. As do many excellent folks out there, who are a joy to read.
On the other hand, I have often gotten back from a weekend and had over 200 messages from the UA mailing list sitting in my mailbox, 175 of which are pure spam and "I think so too, aren't I cool" comments.
Unknown Armies being a very cool game, and good stuff from the list occasionally turning up in the game books (and on the web page), this is a good mailing list, but it can cost ya.