We've got a lot of things going on, and while there haven't been any major updates since the visual refresh and OpenID, the next few months should be big.
http://nextupdate.com/blog/archives/2009/04/april-status-update-1/We'll only send emails for significant product announcements, and those happen every couple of months at most. Of course, we won't give away or sell your e-mail address either.