Blogger have announced the introduction of comment moderation via their blog, Buzz.
In other words, rather than comments being immediately posted to your blog when made, you can have the option to view them first and decide whether to approve or reject them. And you can even set it to let you do this by email (as well as via your dashboard), so that you get an email whenever a comment is made, and you can just click a link to approve or reject the comment.
I won't say much more as the Blogger help page on comment moderation is pretty comprehensive and explains how to turn on comment moderation etc. I don't plan to do so myself as I rarely get spam comments (hope that's not tempting fate!) and I don't have the time to add an extra step.
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