Over the past couple months, there has been a rise in the amount of spam postings on blogs, particularly in the shoutbox area. Knock on wood, but I think the problem is now solved.
From now on, when unregistered guests try to post in a blog, they will be automatically redirected to the login screen. This will prevent any spammers.
Since spammers are no longer an issue (I hope), I added back the two options where you can set the reply and viewing privileges for your blog. Just to your blog control panel, and you'll see the two options near the top.
