Wired.com has an interesting article up about a slightly different use for blogs.

Seniors in the early stages of Alzheimer's disease, with mild to moderate memory loss, are writing Web logs to help them make sense of their daily lives. And the activity, they say, is slowing the onset of their symptoms.

I really liked the article. It's cool seeing someone find interesting ways to apply technology. While a blog isn't required for this (a paper journal could do), it has the added bonus of being something a patient's family could read. Helping them understand what is going on better.