Larry has released a real slick free theme for the BlackBerry 8700. The theme is called WinIphone because it has iPhone like buttons, Mac like banner, and Windows like feel. The screenshots look awesome and the theme looked good on the 8700 I have lying around.
Larry has promised that he will release versions for other devices (8100, 8300, 8800) if there is enough interest so let him know in the comments. Larry has not hosted the files for download so if you want a copy you will have to email him at lfarmer495(at)gmail.com. He is also accepting donations if you want to send him some paypal love to lfarmer495(at)msn.com.
Let me know if you have trouble contacting Larry.