Just found three WP-based blogging hosts. Weblogs.us used to use MT as platform but then switched to WP since MT started to charge. Free signups are temporarily shut down for some reason. Blogsome and Blogthing are the twos suggested by Weblog.us. The latter one is having some database issues and will be back soon.

So far I have no plan to switch to WP, at least for TIMELINE. But I did try out WP by setting up a secret site only available to myself. So far so good. But it's really a pain in the neck to learn WP tags from scratch and tweak templates. :(