Wondering about a methodology for doing this. I think what I’d do is keep the WordPress install alive for the permalinks and just use a little htaccess and then the DNS magic to tumblr. Wondering if any of you kindly folks have tried something like this and if it worked. This desire is completely based on the iPhone tumblr app. So slick.
Tumblr doesn’t support importing from anything, near as I can tell. Which is always a good sign.