One of our readers Rubin sent in a great theme called MacBerry Zen. It is truly just another Apple knock-off but it does look nice and clean so I thought it worthy of mention.
The icons are custom which make it look really nice. The top bar is true to the mac style but I am no the greatest fan of the grey on white colors of the date and time. I found it interesting that the author took screenshots of the theme using OS 4.5. 
You can pick it up for install OTA and with Desktop Manager at this link. Don’t worry about the Spanish you don’t need to understand it. Just scroll down to the end of the screenshots and select OTA or the appropriate Desktop Manager install file.
CybaCowboy ( View Profile) Newcomer - Posts: 25
Posted: April 30, 2008 at 12:49 AM EST
The OTA link doesn’t work – it just brings up what appears to be a list of the files…
~ Posted wirelessly from my BlackBerry 8800 ~
gameboy213 Not Registered
Posted: April 30, 2008 at 10:38 AM EST
Same here…. it is broken
Ronen Halevy ( View Profile) Senior admin - Posts: 5298
Posted: April 30, 2008 at 12:59 PM EST
yeah it seems like they did not setup the correct MIME types on their webserver for BlackBerry OTA downloading