Blogging with my students - a change of plan

I made a real mess with the last post. That's what happens when you write about something you haven't thought out carefully beforehand.
So here it is - there are not going to be hundreds of class blogs, there is going to be only one. I will start with my upper-intermediate class for two reasons:
1. their English is relatively good and
2. I taught them in the previous semester, which means that I know them.
Also, they are doing portfolio assessments, so I could merge these two things together (again, I haven't thought it out carefully).
I am not going to teach (grammar or vocabulary) in the blog.
I was thinking of starting it as a meme, something like our Week 4 challenge. What do you think?
Any ideas on how to merge blogging and portfolio assessment?

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