Similar but different vein, a bunch of friends have started "TIL" (today-i-learned) micro-blogs, with a one or two sentences each day of something they learned, found out about. Most are a mix of technical & real world things. For many, it's just a single markdown file they check in to github.

It's a fascinating & interesting ultra-short thing to share! I love it a lot, really interesting connection to folks, to keep tabs on where-abouts they are, what they are up to, while not requiring long posts.