WordPress 3.0 is  now available for download here.  I will probably wait for a few updates before upgrading.  In addition iThemes is still working on some things on their end, so I want to wait for them as well.  Remember, even if you wait, you should BACKUP your site.  I recommend Backup Buddy for that function simply because it saves me so much time.  Yes, there are plugins that backup your database and plugins that backup your files and plugins that backup your pages and posts.  Backup Buddy does it all with one click. Seriously.  So watch the video on the new WordPress release, but remember to BACKUP, BACKUP, BACKUP!