I have to preface this by saying that each of these 3 new themes at BBextras.com cost $10 which is quite pricey. Other than that these are some of the slickest and most innovative themes I have ever seen for BlackBerry devices. Usually themes are just the same thing over and over but these themes really stretch the limits. The developer managed to combine a Zen theme with a Today theme and in another did a perfect replica of the Mac Tiger. His other theme L Dimension has both a vertical and horizontal Zen menu at the same time!!! Check out all the themes at BBextras.com
As I said $10 is quite a bit for a theme but if you were ever planning on paying for one these are the coolest I have seen to date. So far compatibility seems to be with BlackBerry 8300 Curve and 8800 devices.