If we accept the premise that blogging is primarily storytelling, then if we can learn by writing stories, we can learn by blogging.
Ana Ulin, who has a multicultural and multilingual background (and currently lives in Sweden) is the author of the blog at anaulin.org.
In this entry, she offers a number of quotes on the process of writing from the book How to Get a PhD, and then adds:
“Interestingly, the ‘writing to learn’ idea is in tune with some popular ideas about blog writing.” She then cites several blogs that reinforce the writing-to-learn by blogging concept.