Somehow I have become a cross between Edina in Ab-Fab & Andrew Sullivan. In search of why Twitter matters, which clearly it does but I'm too prolix, I find, via Fred Wilson's blog, that I'm interested in tumbleblogs. Here's Wikipedia:
A tumblelog (also known as a tlog or tumblog) is a variation of a blog that favors short-form, mixed-media posts over the longer editorial posts frequently associated with blogging. Common post formats found on tumblelogs include links, photos, quotes, dialogues, and video. Unlike blogs, tumblelogs are frequently used to share the author's creations, discoveries, or experiences while providing little or no commentary.