Tumblr is a great tool because it's so fast and easy to use. It's got less flexibility than, say, Wordpress, but sometimes that's a good thing, like when you're live-blogging and you just want to insert a picture quickly, without fumbling through lots of options. I use live-blogging as a way to take notes when I attend events. I used to come home with a lot of paper notes that never got processed. They didn't even help me, let alone anyone else, but live-blogging makes insights available to whoever might need them, like a tweetcast, but with more detail.
If you want to see my marketing blogs from a few years back -- including those of great speakers like those presenting at South By Southwest and many ASAE conferences, just check out Adventures in Marketing, or if there's a marketing topic you're curious about, I've probably written on it, so just ask and I'll send you what I find in the archives!
Tom McClintock is the owner and founder of Relationship Martech.