I can see the value in Tumblr for many folks – quick, easy posting of different media types in a clean and (seemingly) customizable format. There are still no comments, and this is a sticking point for me (but certainly not everybody). Sure, I only get a few now and again, but I still love the ability for readers to post relevant links and anecdotes. Additionally, I’m fairly comfortable with WordPress right now. I like the ability to use drafts, recognize multiple authors, and of course my beloved list of categories (and really, if I could see a list – not just auto-completing as I type – of tags I’ve used before, this wouldn’t matter).
P.S. If you have Tumblr pointing to a sub-domain, is it possible to slap the Mint JS call in the HTML so your visits are tracked?