Michael Small the admin of www.blackberrythemes.co.uk just released a hot new theme called Blue Today that I really like. I wont really elaborate much but this theme just looks like you should be paying money for it. The icons are stock but the top bar is just very nice and subtle.
Sadly the theme is only available for Desktop installs. You can pick it up free at this link: www.blackberrythemes.co.uk/id3.html