ExtJS WordPress Theme: This WordPress theme was put together to show off the capabilities of the ExtJS library and according to the author, is more of an experiment and still in alpha. This theme is chock full of features and looks more like an AJAX email application than a WordPress theme. Features include AJAXy stuff like and accordian sidebar, full AJAX load of posts and comments, AJAX calendar, quick search and comment preview. The theme is widget and tag aware but the author warns that some plugins and widgets might not work as expected. Now the theme does seem a little slow to load and to navigate but that might be due to the server it is running on and not the application. It is definitely fun to play with and navigate around! The theme is released under the LGPL.