One advantage of Tumblr that intrigues me, and is discussed in the article, is the community/social/sharing aspects. The nice thing is that so long as you don't want/need a ton of customization, you can set up a Tumblr blog and for anyone who doesn't participate in Tumblr it just looks like an ordinary blog and can be read and subscribed to as such (with RSS or the like). But then you also get the potential boost of reblogs and likes from Tumblr users. Seems like the best of both worlds.