I love the idea of being able to identify blog entries as as an assignment submission, or as a discussion, or as a personal reflection. Moodle can create appropriate cross-links and help keep students organized. It will also help the students learn how and what to share. Great idea especially when combined with the earlier idea of "blog this"!
I found this link helpful, thanks for sharing!
http://moodle.org/mod/forum/discuss.php?d=89653&parent=4396508