Almost 50% of the spam comments that I get on my blogs point to blogspot.com. Even though most, if not all is caught by Akismet, I would like a plugin that goes through Akismet and checks for a link to blogspot, even the ones through the miniurls. After finding the blogspot blogs, it will auto flag the blogspot as objectionable content and then move to the next. This may not stop them sending spam to your blog but it would help blogspot kill all the spam blogs and that would cut out a huge place for spamming.