Fetish is a ShapeShifter theme with a smooth grey color scheme that sets it apart from other themes.
The second beta release of Fetish 2 has a new iTunes skin that successfully incorporates the look and feel of Fetish. Note that some portions of this skin may change when the theme is released, so it's considered experimental. Fetish 2 also comes with an iconset and new desktops.
To use Fetish 2, you'll need ShapeShifter. To keep up with updates and see screenshots of ongoing development, follow the developer's RSS feed. Overall, Fetish 2 seems to be a promising upgrade with new features and more customization options.
Version 2.0 Beta: N/A