If you’re interested in what themes might be coming down the pipeline or want to be notified when they are released, subscribing to the Themes discussion forum on Moodle.org is a great way to stay abreast of the developments. Shaun Daubney, creator of the Aardvark themes is working on Aardvark 2.2 which will feature some Twitter/Google like features aesthetics with a consistent menu/profile bar. Shaun’s posted a screenshot and his “roadmap” for the theme’s features. If you’re an Aardvark fan and want a say, checkout the forum post and add your $.02: http://moodle.org/mod/forum/discuss.php?d=195990.
I’m already a fan. Aardvark 2.2: due Easter or later.