Not one, but two (three if you include the versions lol) sweet new themes have been released by JC Designs - Gadgetbean.com recently for the Bold.
The first one being CrossBar eXtreme (video) which is an amazing theme that has a whopping 19 user customizable icons for the homescreen. Seriously, I can't think of any reason while using this theme that you would ever really even need to use the application key to jump to the main screen of your BlackBerry. With so many user customizable icons on the homescreen, you can pack it all in there. Excellent!!
Next up is my personal favorite of the lot, Platinum Series, which is coming available in Crossbar Plus and Today Plus variations. With its fresh looking icons and over all industrial look to it, it's easy to see why this one is my favorite of the bunch. Everything in this theme is laid out nicely and just seems to "fit". The menus are stylized to match the theme with a nice grey/platinum background and flow nicely throughout the whole theme.
Both themes are now ready to go in the ShopCrackBerry Store for only $7 and be sure to check out the rest of the themes offered by JC Designs - Gadgetbean.com that are available. You can check out the forums for more info and screenshots as well.