Over here you can download Arras Theme from various sources, whether you are just a simple WordPress user or an adventurous theme developer. Before you decide on downloading the theme, please ensure that you meet the requirements.
WordPress Themes Directory
The easiest way to install this theme is to get it from the WordPress themes directory, this way you can upgrade to the latest version easily using the in-built theme auto-upgrade tool.
Download Arras Theme 1.3 - WordPress Themes Directory
Theme Add-Ons
Once you have downloaded the theme, you can check out the add-ons page for any language packs, alternate styles and plugins.
Nightly Builds
If you want to have the latest updates and features (and bugs), feel free to check out the development trunk. You will need a Subversion (SVN) client like TortoiseSVN or SmartSVN to download it.
http://arras-theme.googlecode.com/svn/theme/trunk/