Add PubSubHubbub support to your WordPress site, with a built in hub
One of the new very interesting things in WordPress 3.0 are individual post-types you can implement with little effort. Back then, you had to expand the database and write your own interface for it, now you just have to add a few lines of code - of course this is just the current state, which can be change until the final release.
With a single click, WPtouch transforms your WordPress blog into an iPhone application-style theme, complete with ajax loading articles and effects, when viewed from an iPhone, iPod touch, Android or BlackBerry touch mobile device.