The neatest thing about tumblelogs is that unlike regular blogging - which confronts you with a large, empty textarea to type your thoughts into - there are 6 distinct types of posts that have their own visual format: a "traditional" blog post, a photo, a quote, a single link, a conversational transcript, and a video.

— Geek to Live: Instant, no-overhead blog with Tumblr - Lifehacker