I’m not really shutting down the blog, but spam has become a minor nuisance. Luckily, the folks at Movable Type have been working on a solution, which will be rolled out with the next major release of the software.
The solution is a registration service called TypeKey that lets you register a username for use when posting comments to any Movable Type blog. The first time you post a comment at Global Spin I’ll approve you, and after that your comments will appear on the site as soon as you post them. Unapproved comments will never show up on the site, so hopefully that will discourage blog spammers by taking away the benefit of spam.
The next version of Movable Type is still in alpha testing, so it may be a while before TypeKey is set up here. In the interim, keep notifying me of spam as it occurs. Thanks!