Adult learners are starting to get into Self-Publishing (aka blogging).
and 
Barbara Dieu, a Brazilian educator, has set up an Exchange for ESL students around the world. With two colleagues, she has found a way to gather and re-publish the writings of students who have blog journals in their ESL classes.
(This re-publishing is known as ‘aggregation’.)
The site is called Dakita (i don’t know why), and the collection of student writings you’ll find in The Orchard (or The Exchange). Worth a look, especially if you’re thinking of using blogs in class.
.. michael