Structured Blogging was just updated to version 1.pre13, and one of the changes is apparently a new content type (well, it may have been in 1.pre12 - I skipped a version) that supports a structured review of a journal article.
This could be quite useful in academic blogging. Imagine a spider that crawls the blogs of your students (or of students and professors across the 'sphere), indexing journal article reviews. It could make it very easy to share notes and thoughts on an article, or to create a distributed journal bibliography for communities of practice...
Here's a screenshot of a mockup journal article review (for a journal that happened to be sitting on my desk):
